{"segment":[{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 v\u00e0o \u00f4 tr\u1ed1ng ","title_trans":"","temp":"fill_the_blank","correct":[[["-64"]]],"list":[{"point":5,"width":40,"type_input":"","input_hint":["frac"],"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/13.jpg' \/><\/center>K\u1ebft qu\u1ea3 ph\u00e9p chia $8x^3:(-\\dfrac{1}{8}x^2)$ c\u00f3 h\u1ec7 s\u1ed1 l\u00e0 _input_","explain":"<span class='basic_left'> <br\/>$8x^3:(-\\dfrac{1}{8}x^2)=-64x$.<br\/> H\u1ec7 s\u1ed1 l\u00e0 $-64$ .<\/span> "}]}],"id_ques":631},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 v\u00e0o \u00f4 tr\u1ed1ng ","title_trans":"","temp":"fill_the_blank","correct":[[["-2"]]],"list":[{"point":5,"width":40,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/13.jpg' \/><\/center>K\u1ebft qu\u1ea3 ph\u00e9p chia $(2ab+6a^2b^2-4b):2b$ c\u00f3 h\u1ec7 s\u1ed1 t\u1ef1 do l\u00e0 _input_","explain":"<span class='basic_left'>$\\begin{align} &(2ab+6a^2b^2-4b):2b \\\\ & =2ab:2b+6a^2b^2:2b-4b:2b \\\\ &= a+3a^2b-2 \\\\ \\end{align}$ <br\/> H\u1ec7 s\u1ed1 t\u1ef1 do l\u00e0 $-2$. <br\/> <span class='basic_pink'> Do \u0111\u00f3 ph\u1ea3i \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 $-2$. <\/span><\/span> "}]}],"id_ques":632},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 v\u00e0o \u00f4 tr\u1ed1ng ","title_trans":"","temp":"fill_the_blank","correct":[[["3"]]],"list":[{"point":5,"width":40,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/12.jpg' \/><\/center>K\u1ebft qu\u1ea3 ph\u00e9p chia $(3x^4+\\dfrac{1}{3}x^2):x$ c\u00f3 h\u1ec7 s\u1ed1 c\u1ee7a $x^3$ l\u00e0 _input_","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1:<\/b> Th\u1ef1c hi\u1ec7n chia \u0111a th\u1ee9c cho \u0111\u01a1n th\u1ee9c.<br\/> <b> B\u01b0\u1edbc 2:<\/b> T\u00ecm h\u1ec7 s\u1ed1 \u0111i v\u1edbi $x^3$. <br\/><span class='basic_green'>B\u00e0i gi\u1ea3i<\/span><br\/>$\\begin{align} &(3x^4+\\dfrac{1}{3}x^2):x \\\\ & =3x^4:x+\\dfrac{1}{3}x^2:x \\\\ &= 3x^3+\\dfrac{1}{3}x \\\\ \\end{align}$<br\/> H\u1ec7 s\u1ed1 c\u1ee7a $x^3$ l\u00e0 $3$. <br\/> <span class='basic_pink'> Do \u0111\u00f3 ph\u1ea3i \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 $3$. <\/span><\/span> "}]}],"id_ques":633},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 v\u00e0o \u00f4 tr\u1ed1ng ","title_trans":"","temp":"fill_the_blank","correct":[[["-2"]]],"list":[{"point":5,"width":40,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/12.jpg' \/><\/center>Bi\u1ebft $2016(x^{2016}+x^{2015}):x^{2015}=-2016$, gi\u00e1 tr\u1ecb c\u1ee7a $x$ l\u00e0 _input_","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1:<\/b> Chia hai v\u1ebf cho $2016$.<br\/><b> B\u01b0\u1edbc 2:<\/b> Th\u1ef1c hi\u1ec7n chia \u0111a th\u1ee9c cho \u0111\u01a1n th\u1ee9c \u1edf v\u1ebf tr\u00e1i.<br\/> <b> B\u01b0\u1edbc 3:<\/b> R\u00fat g\u1ecdn r\u1ed3i t\u00ecm gi\u00e1 tr\u1ecb c\u1ee7a $x$. <br\/><span class='basic_green'>B\u00e0i gi\u1ea3i<\/span><br\/>$ 2016(x^{2016}+x^{2015}):x^{2015}=-2016 \\\\ \\Leftrightarrow (x^{2016}+x^{2015}):x^{2015}=-1 \\\\ \\Leftrightarrow x^{2016}:x^{2015}+x^{2015}:x^{2015} =-1 \\\\ \\Leftrightarrow x+1 =-1 \\\\ \\Leftrightarrow x =-2$ <br\/> <span class='basic_pink'> Do \u0111\u00f3 ph\u1ea3i \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 $-2$. <\/span><\/span> "}]}],"id_ques":634},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 v\u00e0o \u00f4 tr\u1ed1ng ","title_trans":"","temp":"fill_the_blank","correct":[[["8"]]],"list":[{"point":5,"width":40,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/12.jpg' \/><\/center>Bi\u1ebft $(6x^3-3x^2):3x^2$$-(4x^2+8x):4x=5$, gi\u00e1 tr\u1ecb c\u1ee7a $x$ l\u00e0 _input_","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1:<\/b> Th\u1ef1c hi\u1ec7n chia \u0111a th\u1ee9c cho \u0111\u01a1n th\u1ee9c \u1edf v\u1ebf tr\u00e1i.<br\/> <b> B\u01b0\u1edbc 2:<\/b> R\u00fat g\u1ecdn r\u1ed3i t\u00ecm gi\u00e1 tr\u1ecb c\u1ee7a $x$. <br\/><span class='basic_green'>B\u00e0i gi\u1ea3i<\/span><br\/>$ (6x^3-3x^2):3x^2-(4x^2+8x):4x =5 \\\\ \\Leftrightarrow 6{{x}^{3}}:3{{x}^{2}}-3{{x}^{2}}:3{{x}^{2}} -4x^2:4x-8x:4x =5 \\\\ \\Leftrightarrow 2x-1-x-2 =5 \\\\ \\Leftrightarrow x-3 = 5 \\\\ \\Leftrightarrow x =8 $ <br\/> <span class='basic_pink'> Do \u0111\u00f3 ph\u1ea3i \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 $8$. <\/span><\/span> "}]}],"id_ques":635},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 v\u00e0o \u00f4 tr\u1ed1ng ","title_trans":"","temp":"fill_the_blank_random","correct":[[["1"],["-1"]]],"list":[{"point":5,"width":40,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/11.jpg' \/><\/center>Bi\u1ebft $11x^{12}y:x^{10}y=11$, gi\u00e1 tr\u1ecb c\u1ee7a $x$ l\u00e0 $\\left\\{ \\begin{align}& x=\\FormInput[40][bl_elm_true basic_elm basic_blank basic_blank_part]{} \\\\ & x=\\FormInput[40][bl_elm_true basic_elm basic_blank basic_blank_part]{} \\\\ \\end{align} \\right.$","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1:<\/b> Th\u1ef1c hi\u1ec7n chia \u0111\u01a1n th\u1ee9c cho \u0111\u01a1n th\u1ee9c \u1edf v\u1ebf tr\u00e1i.<br\/> <b> B\u01b0\u1edbc 2:<\/b> T\u1eeb \u0111\u00f3 t\u00ecm gi\u00e1 tr\u1ecb c\u1ee7a $x$. <br\/><span class='basic_green'>B\u00e0i gi\u1ea3i<\/span><br\/>$ 11x^{12}y:x^{10}y=11 \\\\ \\Leftrightarrow 11x^2=11 \\\\ \\Leftrightarrow x^2=1 \\\\ \\Leftrightarrow x=\\pm 1 $ <br\/> <span class='basic_pink'> Do \u0111\u00f3 ph\u1ea3i \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 $1$ v\u00e0 $-1$. <\/span><\/span> "}]}],"id_ques":636},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t.","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/11.jpg' \/><\/center> \u0110a th\u1ee9c $A=(x^2y^3z^4)^2$ chia h\u1ebft cho \u0111\u01a1n th\u1ee9c $B=xyzt$ <b> \u0111\u00fang <\/b> hay <b> sai <\/b>? ","select":["\u0110\u00fang","Sai"],"explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn<\/span><br\/> <b> Quy t\u1eafc:<\/b> \u0110\u1ec3 $ax^my^n$ chia h\u1ebft cho $bx^py^q$ th\u00ec $\\left\\{ \\begin{align} & m\\ge p \\\\ & n\\ge q \\\\ \\end{align} \\right.$<br\/> <b> B\u01b0\u1edbc 1:<\/b> X\u00e9t t\u1eebng h\u1ea1ng t\u1eed c\u1ee7a $A$ xem c\u00f3 chia h\u1ebft cho $B$ kh\u00f4ng.<br\/> <b> B\u01b0\u1edbc 2:<\/b> K\u1ebft lu\u1eadn $A$ c\u00f3 chia h\u1ebft cho $B$ kh\u00f4ng. <br\/> N\u1ebfu $a\\,\\vdots \\, m;b\\,\\vdots \\,m$ th\u00ec $(a+b)\\,\\vdots \\, m$<br\/> N\u1ebfu $a\\,\\vdots \\, m;b\\,\\not\\vdots \\,m$ th\u00ec $(a+b)\\,\\not\\vdots \\, m$. <br\/><span class='basic_green'>Gi\u1ea3i<\/span><br\/><span class='basic_left'>Ta th\u1ea5y:<br\/> $ x^2y^3z^4\\,\\,\\not\\vdots \\,\\,xyzt \\,$$\\Rightarrow \\,\\,(x^2y^3z^4)^2\\,\\,\\not\\vdots\\,\\,\\,xyzt\\,\\,$$\\Rightarrow \\,\\,A\\,\\,\\not\\vdots \\,\\,\\,B$ <span><br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 Sai.<\/span>","column":2}]}],"id_ques":637},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t.","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/10.jpg' \/><\/center> \u0110a th\u1ee9c $A=8x^3-25x^2$ chia h\u1ebft cho \u0111\u01a1n th\u1ee9c $B=x^2$ <b> \u0111\u00fang <\/b> hay <b> sai <\/b>? ","select":["\u0110\u00fang","Sai"],"explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn<\/span><br\/> <b> Quy t\u1eafc:<\/b> \u0110\u1ec3 $ax^my^n$ chia h\u1ebft cho $bx^py^q$ th\u00ec $\\left\\{ \\begin{align} & m\\ge p \\\\ & n\\ge q \\\\ \\end{align} \\right.$<br\/> <b> B\u01b0\u1edbc 1:<\/b> X\u00e9t t\u1eebng h\u1ea1ng t\u1eed c\u1ee7a $A$ xem c\u00f3 chia h\u1ebft cho $B$ kh\u00f4ng.<br\/> <b> B\u01b0\u1edbc 2:<\/b> K\u1ebft lu\u1eadn $A$ c\u00f3 chia h\u1ebft cho $B$ kh\u00f4ng. <br\/> N\u1ebfu $a\\,\\vdots \\, m;b\\,\\vdots \\,m$ th\u00ec $(a+b)\\,\\vdots \\, m$. <br\/><span class='basic_green'>Gi\u1ea3i<\/span><br\/><span class='basic_left'>Ta th\u1ea5y:<br\/> $\\left\\{ \\begin{align} & 8{{x}^{3}}\\,\\,\\vdots \\,\\,{{x}^{2}} \\\\ & -25{{x}^{2}}\\,\\,\\vdots \\,\\,{{x}^{2}} \\\\ \\end{align} \\right.\\,\\,$$ \\Leftrightarrow \\,\\,\\left( 8x^3-25x^2 \\right)\\,\\,\\vdots\\,\\,\\,{{x}^{2}}\\,\\,\\Leftrightarrow \\,\\,A\\,\\,\\vdots \\,\\,\\,B$ <span><br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 \u0110\u00fang.<\/span>","column":2}]}],"id_ques":638},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/10.jpg' \/><\/center> T\u00ecm $n \\in \\mathbb{N}$ \u0111\u1ec3 ph\u00e9p chia sau l\u00e0 ph\u00e9p chia h\u1ebft:<br\/> $x^{n-3}y^7:xy$ ","select":["A. $n\\,\\in\\,\\mathbb{N};\\,n \\ge 4 $","B. $n\\,\\in\\,\\mathbb{N};\\,n > 4 $","C. $n\\,\\in\\,\\mathbb{N};\\,n \\ge 5$","D. $n\\,\\in\\,\\mathbb{N};\\,n > 5$"],"explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn<\/span><br\/> <b> Quy t\u1eafc:<\/b> \u0110\u1ec3 $ax^my^n$ chia h\u1ebft cho $bx^py^q$ th\u00ec $\\left\\{ \\begin{align} & m\\ge p \\\\ & n\\ge q \\\\ \\end{align} \\right.$ <br\/><span class='basic_green'>Gi\u1ea3i<\/span><br\/><span class='basic_left'> V\u00ec $7 > 1$ n\u00ean \u0111\u1ec3 $x^{n-3}y^7:xy$ l\u00e0 ph\u00e9p chia h\u1ebft th\u00ec $ n-3\\ge 1 \\Leftrightarrow n \\ge 4$ $(n \\in \\mathbb{N})$ <span><br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span>","column":2}]}],"id_ques":639},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/9.jpg' \/><\/center> T\u00ecm $n \\in \\mathbb{N}$ \u0111\u1ec3 ph\u00e9p chia sau l\u00e0 ph\u00e9p chia h\u1ebft:<br\/> $(-x^6+5x^4):(-x^n)$ ","select":["A. $n\\,\\in\\,\\mathbb{N};\\,n \\ge 6 $","B. $n\\,\\in\\,\\mathbb{N};\\,n \\le 6 $","C. $n\\,\\in\\,\\mathbb{N};\\,n \\ge 4$","D. $n\\,\\in\\,\\mathbb{N};\\,n \\le 4$"],"explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn<\/span><br\/> <b> Quy t\u1eafc:<\/b> \u0110\u1ec3 $ax^my^n$ chia h\u1ebft cho $bx^py^q$ th\u00ec $\\left\\{ \\begin{align} & m\\ge p \\\\ & n\\ge q \\\\ \\end{align} \\right.$ <br\/><span class='basic_green'>Gi\u1ea3i<\/span><br\/><span class='basic_left'> Ta c\u00f3: <br\/> $(-x^6+5x^4):(-x^n)$$=-x^6:(-x^n)+5x^4:(-x^n)$ <br\/> Ph\u00e9p chia tr\u00ean l\u00e0 ph\u00e9p chia h\u1ebft $\\Leftrightarrow$ $\\left\\{ \\begin{align} & -{{x}^{6}}\\,\\,\\,\\vdots \\,\\,\\,\\left( -{{x}^{n}} \\right) \\\\ & 5{{x}^{4}}\\,\\,\\,\\vdots \\,\\,\\,\\left( -{{x}^{n}} \\right) \\\\ \\end{align} \\right.$ $\\Leftrightarrow $ $\\left\\{ \\begin{aligned} & 6\\ge n \\\\ & 4\\ge n \\\\ \\end{aligned} \\right.\\Leftrightarrow n\\le 4$ v\u1edbi $n \\in \\mathbb{N}$ <span><br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 D.<\/span>","column":2}]}],"id_ques":640},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/9.jpg' \/><\/center> T\u00ecm $n \\in \\mathbb{N}$ \u0111\u1ec3 ph\u00e9p chia sau l\u00e0 ph\u00e9p chia h\u1ebft:<br\/> $3x^n:4x^2$ ","select":["A. $n\\,\\in\\,\\mathbb{N};\\,n > 2$ ","B. $n\\,\\in\\,\\mathbb{N};\\,n < 2$","C. $n\\,\\in\\,\\mathbb{N};\\,n\\ge 2$","D. $n\\,\\in\\,\\mathbb{N};\\,n \\le 2$"],"explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn<\/span><br\/> <b> Quy t\u1eafc:<\/b> \u0110\u1ec3 $ax^my^n$ chia h\u1ebft cho $bx^py^q$ th\u00ec $\\left\\{ \\begin{align} & m\\ge p \\\\ & n\\ge q \\\\ \\end{align} \\right.$ <br\/><span class='basic_green'>Gi\u1ea3i<\/span><br\/><span class='basic_left'>\u0110\u1ec3 $3x^n:4x^2$ l\u00e0 ph\u00e9p chia h\u1ebft th\u00ec $n\\ge 2$ v\u1edbi $n\\in \\mathbb{N}$ <span><br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span>","column":2}]}],"id_ques":641},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 v\u00e0o \u00f4 tr\u1ed1ng ","title_trans":"","temp":"fill_the_blank","correct":[[["-45"]]],"list":[{"point":5,"width":40,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/8.jpg' \/><\/center> Gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c $(3x^3y^2-5x^2y^3+4x^3y^3):x^2y^2$ t\u1ea1i $x = -2; y =3$ l\u00e0 _input_","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1:<\/b> T\u00ecm k\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p chia \u0111\u00e3 cho<br\/> <b> B\u01b0\u1edbc 2:<\/b> Thay $x = -2; y =3$ v\u00e0o \u0111\u1ec3 t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c. <br\/><span class='basic_green'>B\u00e0i gi\u1ea3i<\/span><br\/>$(3x^3y^2-5x^2y^3+4x^3y^3):x^2y^2 \\\\ =3x^3y^2:x^2y^2-5x^2y^3:x^2y^2 +4x^3y^3:x^2y^2 \\\\ =3x-5y+4xy$<br\/> Thay $x = -2; y =3$ v\u00e0o bi\u1ec3u th\u1ee9c $3x-5y+4xy$, ta \u0111\u01b0\u1ee3c: <br\/> $3.(-2)-5.3+4.(-2).3 = -6-15-24 = -45$ <br\/> <span class='basic_pink'> Do \u0111\u00f3 s\u1ed1 ph\u1ea3i \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 $-45$. <\/span><\/span> "}]}],"id_ques":642},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 v\u00e0o \u00f4 tr\u1ed1ng ","title_trans":"","temp":"fill_the_blank","correct":[[["2"],["5"]]],"list":[{"point":5,"width":40,"type_input":"","input_hint":["frac"],"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/8.jpg' \/><\/center> Gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c $(3a^2b-4ab^3):5ab$ t\u1ea1i $a=2; b =-1$ l\u00e0 <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1:<\/b> T\u00ecm k\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p chia \u0111\u00e3 cho: \u00c1p d\u1ee5ng quy t\u1eafc chia \u0111a th\u1ee9c cho \u0111\u01a1n th\u1ee9c.<br\/> <b> B\u01b0\u1edbc 2:<\/b> Thay $a=2; b =-1$ v\u00e0o \u0111\u1ec3 t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c. <br\/><span class='basic_green'>B\u00e0i gi\u1ea3i<\/span><br\/>$(3a^2b-4ab^3):5ab \\\\ =3a^2b:5ab- 4ab^3:5ab \\\\ = \\dfrac{3}{5}a - \\dfrac{4}{5}b^2$<br\/> Thay $a=2; b =-1$ v\u00e0o ta \u0111\u01b0\u1ee3c: <br\/> $\\dfrac{3}{5}a-\\dfrac{4}{5}b^2 = \\dfrac{3}{5}.2-\\dfrac{4}{5}.(-1)^2 =\\dfrac{2}{5}$<\/span> "}]}],"id_ques":643},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 v\u00e0o \u00f4 tr\u1ed1ng ","title_trans":"","temp":"fill_the_blank","correct":[[["18"]]],"list":[{"point":5,"width":40,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/5.jpg' \/><\/center> Gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c $-6a^3b^2c:(-2a^2bc)$ t\u1ea1i $a = - 2; b = - 3$ l\u00e0 _input_","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1:<\/b> T\u00ecm k\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p chia \u0111\u00e3 cho.<br\/> <b> B\u01b0\u1edbc 2:<\/b> Thay $a = - 2; b = - 3$ v\u00e0o \u0111\u1ec3 t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c. <br\/><span class='basic_green'>B\u00e0i gi\u1ea3i<\/span><br\/> $-6a^3b^2c:(-2a^2bc)=3ab$<br\/> Thay $a = - 2; b = - 3$ v\u00e0o th\u01b0\u01a1ng, ta \u0111\u01b0\u1ee3c: $3.(-2).(-3)=18$ <br\/> <span class='basic_pink'> Do \u0111\u00f3 ph\u1ea3i \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 $18$. <\/span><\/span> "}]}],"id_ques":644},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/5.jpg' \/><\/center> K\u1ebft qu\u1ea3 ph\u00e9p chia $4^{12}: 4^6$ l\u00e0: ","select":["A. $4^5$ ","B. $4^3$","C. $4^6$","D. $4^2$"],"explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn<\/span><br\/> <b> Quy t\u1eafc: Chia \u0111\u01a1n th\u1ee9c $A$ cho \u0111\u01a1n th\u1ee9c $B$<\/b> <br\/>+ Chia h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c $A$ cho h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c $B$.<br\/> + Chia t\u1eebng l\u0169y th\u1eeba c\u1ee7a bi\u1ebfn trong $A$ cho l\u0169y th\u1eeba c\u1ee7a c\u00f9ng bi\u1ebfn \u0111\u00f3 trong $B$.<br\/><span class='basic_green'>Gi\u1ea3i<\/span><br\/><span class='basic_left'>Ta c\u00f3 :<br\/> $4^{12}:4^6=4^6$ <span><br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span>","column":2}]}],"id_ques":645},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/4.jpg' \/><\/center> K\u1ebft qu\u1ea3 ph\u00e9p chia $(12a^3-a):2a$ l\u00e0: ","select":["A. $6a^2+2$ ","B. $6a^2-2$ ","C. $6a^2-\\dfrac{1}{2}$","D. $6a^3-\\dfrac{1}{2}$"],"explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn<\/span><br\/> <b> Quy t\u1eafc: Chia \u0111\u01a1n th\u1ee9c $A$ cho \u0111\u01a1n th\u1ee9c $B$<\/b> <br\/>+ Chia h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c $A$ cho h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c $B$.<br\/> + Chia t\u1eebng l\u0169y th\u1eeba c\u1ee7a bi\u1ebfn trong $A$ cho l\u0169y th\u1eeba c\u1ee7a c\u00f9ng bi\u1ebfn \u0111\u00f3 trong $B$.<br\/><span class='basic_green'>Gi\u1ea3i<\/span><br\/><span class='basic_left'>Ta c\u00f3 :<br\/> $(12a^3-a):2a = 12a^3:2a-a:2a = 6a^2-\\dfrac{1}{2}$ <span><br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span>","column":2}]}],"id_ques":646},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/3.jpg' \/><\/center> K\u1ebft qu\u1ea3 ph\u00e9p chia $-x^7:x$ l\u00e0: ","select":["A. $-x^7$ ","B. $-x$ ","C. $x^6$","D. $-x^6$"],"explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn<\/span><br\/> <b> Quy t\u1eafc: Chia \u0111\u01a1n th\u1ee9c $A$ cho \u0111\u01a1n th\u1ee9c $B$<\/b> <br\/>+ Chia h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c $A$ cho h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c $B$.<br\/> + Chia t\u1eebng l\u0169y th\u1eeba c\u1ee7a bi\u1ebfn trong $A$ cho l\u0169y th\u1eeba c\u1ee7a c\u00f9ng bi\u1ebfn \u0111\u00f3 trong $B$. <br\/><span class='basic_green'>Gi\u1ea3i<\/span><br\/><span class='basic_left'>Ta c\u00f3 :<br\/> $-x^7:x=-x^{7-1}=-x^6$ <span><br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 D.<\/span>","column":2}]}],"id_ques":647},{"time":24,"part":[{"title":"Ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"select":["A. $a = x^4; b = y^4$","B. $a = x^3; b = y^4$","C. $a = x^3; b = y^3$"],"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/3.jpg' \/><\/center>K\u1ebft qu\u1ea3 ph\u00e9p chia $4x^6y^5z^2:2x^2yz^2$ = $2\\times a\\times b$<br \/>$a, b =?$","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> Quy t\u1eafc: Chia \u0111\u01a1n th\u1ee9c $A$ cho \u0111\u01a1n th\u1ee9c $B$<\/b> <br\/>+ Chia h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c $A$ cho h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c $B$.<br\/> + Chia t\u1eebng l\u0169y th\u1eeba c\u1ee7a bi\u1ebfn trong $A$ cho l\u0169y th\u1eeba c\u1ee7a c\u00f9ng bi\u1ebfn \u0111\u00f3 trong $B$. <br\/><span class='basic_green'>B\u00e0i gi\u1ea3i<\/span><br\/><b> $4x^6y^5z^2:2x^2yz^2 =(4:2).(x^6:x^2).(y^5:y).(z^2:z^2) =2x^4y^4$<\/span> "}]}],"id_ques":648},{"time":24,"part":[{"title":"Ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"select":["A. $2x - 1$","B. $2x^2 - 1$","C. $2x^3 - 1$"],"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/2.jpg' \/><\/center>K\u1ebft qu\u1ea3 ph\u00e9p chia $(2x^4-x):x = ?$","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> Quy t\u1eafc: Chia \u0111\u01a1n th\u1ee9c $A$ cho \u0111\u01a1n th\u1ee9c $B$<\/b> <br\/>+ Chia h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c $A$ cho h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c $B$.<br\/> + Chia t\u1eebng l\u0169y th\u1eeba c\u1ee7a bi\u1ebfn trong $A$ cho l\u0169y th\u1eeba c\u1ee7a c\u00f9ng bi\u1ebfn \u0111\u00f3 trong $B$. <br\/><span class='basic_green'>B\u00e0i gi\u1ea3i<\/span><br\/><b> $(2x^4-x):x = 2x^4:x-x:x = 2x^3-1$<\/span> "}]}],"id_ques":649},{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 v\u00e0o \u00f4 tr\u1ed1ng ","title_trans":"","temp":"fill_the_blank","correct":[[["-x"]]],"list":[{"point":5,"width":40,"type_input":"","input_hint":["frac","sqr"],"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop8/toan/daiso/bai8/lv1/img\/2.jpg' \/><\/center>K\u1ebft qu\u1ea3 ph\u00e9p chia $-x^5:x^4$ = _input_","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> Quy t\u1eafc: Chia \u0111\u01a1n th\u1ee9c $A$ cho \u0111\u01a1n th\u1ee9c $B$<\/b> <br\/>+ Chia h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c $A$ cho h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c $B$.<br\/> + Chia t\u1eebng l\u0169y th\u1eeba c\u1ee7a bi\u1ebfn trong $A$ cho l\u0169y th\u1eeba c\u1ee7a c\u00f9ng bi\u1ebfn \u0111\u00f3 trong $B$. <br\/><span class='basic_green'>B\u00e0i gi\u1ea3i<\/span><br\/><b> $-x^5:x^4=-x^{5-4}=-x$<\/span> "}]}],"id_ques":650}],"lesson":{"save":0,"level":1}}