{"common":{"save":0,"post_id":"1377","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"931","post_id":"1377","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"\u0110\u1ec1 chung cho hai c\u00e2u","temp":"multiple_choice","correct":[[2]],"list":[{"point":10,"ques":"Cho b\u1ea3ng s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea ban \u0111\u1ea7u sau: <br\/> <table><tr><th>7<\/th><th>9<\/th><th>9<\/th><th>10<\/th><th>8<\/th><th>9<\/th><th>10<\/th><th>8<\/th><th>6<\/th><th>9<\/th><\/tr><tr><td>10<\/td><td>8<\/td><td>9<\/td><td>8<\/td><td>9<\/td><td>10<\/td><td>7<\/td><td>8<\/td><td>9<\/td><td>8<\/td><\/tr><tr><td>8<\/td><td>10<\/td><td>9<\/td><td>9<\/td><td>6<\/td><td>8<\/td><td>7<\/td><td>9<\/td><td>10<\/td><td>7<\/td><\/tr><\/table> <br\/> <b>C\u00e2u 1. <\/b> M\u1ed9t b\u1ea1n h\u1ecdc sinh l\u1eadp ra b\u1ea3ng \u201ct\u1ea7n s\u1ed1\u201d t\u01b0\u01a1ng \u1ee9ng sau (b\u1ea3ng $1$): <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>6<\/th><th>7<\/th><th>8<\/th><th>9<\/th><th>10<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>1<\/td><td>4<\/td><td>8<\/td><td>11<\/td><td>6<\/td><td>$N=30$<\/td><\/tr><\/table> <br\/> Kh\u1eb3ng \u0111\u1ecbnh n\u00e0o sau \u0111\u00e2y \u0111\u00fang?","select":["A. B\u1ea3ng $1$ \u0111\u00fang ho\u00e0n to\u00e0n","B. B\u1ea3ng $1$ c\u00f3 $2$ c\u1ed9t sai","C. B\u1ea3ng $1$ c\u00f3 $3$ c\u1ed9t sai","D. B\u1ea3ng $1$ c\u00f3 $4$ c\u1ed9t sai"],"explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>T\u1eeb b\u1ea3ng th\u1ed1ng k\u00ea ban \u0111\u1ea7u x\u00e9t xem c\u00e1c gi\u00e1 tr\u1ecb v\u00e0 t\u1ea7n s\u1ed1 c\u1ee7a m\u1ed7i gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ghi trong b\u1ea3ng $1$ c\u00f3 \u0111\u00fang kh\u00f4ng. <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3 b\u1ea3ng ''t\u1ea7n s\u1ed1'' \u0111\u00fang theo s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea ban \u0111\u1ea7u l\u00e0: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>6<\/th><th>7<\/th><th>8<\/th><th>9<\/th><th>10<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>2<\/td><td>4<\/td><td>8<\/td><td>10<\/td><td>6<\/td><td>$N=30$<\/td><\/tr><\/table> <br\/> Do \u0111\u00f3, b\u1ea3ng $1$ c\u00f3 hai c\u1ed9t sai: T\u1ea7n s\u1ed1 c\u1ee7a gi\u00e1 tr\u1ecb $6$ ph\u1ea3i l\u00e0 $2$ v\u00e0 t\u1ea7n s\u1ed1 c\u1ee7a gi\u00e1 tr\u1ecb $9$ ph\u1ea3i l\u00e0 $10$. <br\/><span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span>","column":2}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:53"},{"id":"932","post_id":"1377","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"\u0110\u1ec1 chung cho hai c\u00e2u","temp":"fill_the_blank","correct":[[["10"],["6"],["9"]]],"list":[{"point":10,"width":40,"content":"","type_input":"","ques":" <span class='basic_left'> Cho b\u1ea3ng s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea ban \u0111\u1ea7u sau: <br\/> <table><tr><th>7<\/th><th>9<\/th><th>9<\/th><th>10<\/th><th>8<\/th><th>9<\/th><th>10<\/th><th>8<\/th><th>6<\/th><th>9<\/th><\/tr><tr><td>10<\/td><td>8<\/td><td>9<\/td><td>8<\/td><td>9<\/td><td>10<\/td><td>7<\/td><td>8<\/td><td>9<\/td><td>8<\/td><\/tr><tr><td>8<\/td><td>10<\/td><td>9<\/td><td>9<\/td><td>6<\/td><td>8<\/td><td>7<\/td><td>9<\/td><td>10<\/td><td>7<\/td><\/tr><\/table> <br\/> <b> C\u00e2u 2. <\/b> \u0110i\u1ec1n v\u00e0o ch\u1ed7 tr\u1ed1ng trong c\u00e1c c\u00e2u sau \u0111\u1ec3 \u0111\u01b0\u1ee3c kh\u1eb3ng \u0111\u1ecbnh \u0111\u00fang. <br\/>- Gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t l\u00e0 _input_ <br\/> - Gi\u00e1 tr\u1ecb nh\u1ecf nh\u1ea5t l\u00e0 _input_ <br\/> - Gi\u00e1 tr\u1ecb c\u1ee7a t\u1ea7n s\u1ed1 l\u1edbn nh\u1ea5t l\u00e0 _input_ <\/span>","explain":"<span class='basic_left'>Ta c\u00f3 b\u1ea3ng \u201ct\u1ea7n s\u1ed1\u201d theo b\u1ea3ng th\u1ed1ng k\u00ea nh\u01b0 sau: <br\/> <table><tr><th>Gi\u00e1 tr\u1ecb $(x)$<\/th><th>6<\/th><th>7<\/th><th>8<\/th><th>9<\/th><th>10<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>2<\/td><td>4<\/td><td>8<\/td><td>10<\/td><td>6<\/td><td>$N=30$<\/td><\/tr><\/table> <br\/> Do \u0111\u00f3 ta c\u00f3: <br\/> - Gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t l\u00e0 $10$ <br\/> - Gi\u00e1 tr\u1ecb nh\u1ecf nh\u1ea5t l\u00e0 $6$ <br\/> - Gi\u00e1 tr\u1ecb c\u1ee7a t\u1ea7n s\u1ed1 l\u1edbn nh\u1ea5t l\u00e0 $9$ <br\/> <span class='basic_pink'> V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o c\u00e1c \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t l\u00e0 $10; 6;9$.<\/span><\/span>"}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:53"},{"id":"933","post_id":"1377","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n k\u1ebft qu\u1ea3 \u0111\u00fang nh\u1ea5t v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["8"],["4"]]],"list":[{"point":10,"width":40,"content":"","type_input":"","ques":" B\u1ea3ng sau th\u1ed1ng k\u00ea \u0111i\u1ec3m s\u1ed1 m\u1ed9t b\u00e0i ki\u1ec3m tra c\u1ee7a $40$ h\u1ecdc sinh:<br\/> <table><tr><th>Lo\u1ea1i \u0111i\u1ec3m<\/th><th>4<\/th><th>5<\/th><th>6<\/th><th>7<\/th><th>8<\/th><th>9<\/th><th>10<\/th><th><\/th><\/tr><tr><td>T\u1ea7n s\u1ed1 $(n)$<\/td><td>1<\/td><td>0<\/td><td>$x$<\/td><td>15<\/td><td>10<\/td><td>$y$<\/td><td>2<\/td><td>$N=40$<\/td><\/tr><\/table> <br\/> Bi\u1ebft s\u1ed1 h\u1ecdc sinh \u0111\u1ea1t t\u1eeb \u0111i\u1ec3m $8$ tr\u1edf l\u00ean chi\u1ebfm t\u1ec9 l\u1ec7 $40\\%$. H\u00e3y t\u00ednh $x$ v\u00e0 $y$. <br\/> <b> \u0110\u00e1p \u00e1n: <\/b> $x= \\FormInput[40][bl_elm_true basic_elm basic_blank basic_blank_part]{}; y=\\FormInput[40][bl_elm_true basic_elm basic_blank basic_blank_part]{}$ <\/span>","hint":"T\u00ednh t\u1ed5ng s\u1ed1 h\u1ecdc sinh \u0111\u1ea1t t\u1eeb \u0111i\u1ec3m $8$ tr\u1edf l\u00ean, t\u1eeb \u0111\u00f3 t\u00ecm $y$.","explain":"<span class='basic_left'>S\u1ed1 h\u1ecdc sinh \u0111\u1ea1t t\u1eeb $8$ \u0111i\u1ec3m tr\u1edf l\u00ean l\u00e0: <br\/>$40\\cdot \\dfrac{40}{100}=16$ (h\u1ecdc sinh) <br\/>Ta c\u00f3: <br\/>$\\begin{align} & 10+y+2=16 \\\\ & \\Rightarrow y=16-10-2 \\\\ & \\Rightarrow y=4 \\\\ \\end{align}$ <br\/> M\u1eb7t kh\u00e1c: <br\/> $\\begin{align} & 1+0+x+15+10+4+2=40 \\\\ & \\Rightarrow x+32=40 \\\\ & \\Rightarrow x=40-32 \\\\ & \\Rightarrow x=8 \\\\ \\end{align}$ <br\/>V\u1eady $x = 8; y = 4$<br\/> <span class='basic_pink'> V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o c\u00e1c \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t l\u00e0 $8;4$.<\/span><\/span>"}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:53"}]}