{"common":{"save":0,"post_id":"1019","level":1,"total":20,"point":5,"point_extra":0},"segment":[{"id":"451","post_id":"1019","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":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" <center><img src='img\/4.jpg' \/><\/center> N\u1ebfu a l\u00e0 m\u1ed9t s\u1ed1 h\u1eefu t\u1ec9 th\u00ec: ","select":["A. a c\u0169ng l\u00e0 m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean. ","B. a c\u0169ng l\u00e0 m\u1ed9t s\u1ed1 nguy\u00ean. ","C. a c\u0169ng l\u00e0 m\u1ed9t s\u1ed1 v\u00f4 t\u1ec9.","D. a c\u0169ng l\u00e0 m\u1ed9t s\u1ed1 th\u1ef1c."],"hint":"Ta c\u00f3: $\\mathbb{N} \\subset \\mathbb{Z} \\subset \\mathbb{Q} \\subset \\mathbb{R} $","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span> <br\/> * $\\mathbb{Q}$ l\u00e0 t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 h\u1eefu t\u1ec9, l\u00e0 s\u1ed1 \u0111\u01b0\u1ee3c vi\u1ebft d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 $\\dfrac{a}{b}$ v\u1edbi $a,b \u2208 \\mathbb{Z} , b \u2260 0$. <br\/> * $\\mathbb{Z}$ l\u00e0 t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 nguy\u00ean, bao g\u1ed3m $\u2026,-2 ;-1 ;0 ;1 ;2 ;\u2026$ <br\/> * $\\mathbb{I}$ t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 v\u00f4 t\u1ec9 l\u00e0 s\u1ed1 vi\u1ebft \u0111\u01b0\u1ee3c d\u01b0\u1edbi d\u1ea1ng s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n kh\u00f4ng tu\u1ea7n ho\u00e0n. <br\/> * $\\mathbb{R}$ t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 th\u1ef1c bao g\u1ed3m c\u00e1c s\u1ed1 h\u1eefu t\u1ec9 v\u00e0 c\u00e1c s\u1ed1 v\u00f4 t\u1ec9. <\/span> <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Quan h\u1ec7 gi\u1eefa c\u00e1c t\u1eadp h\u1ee3p: <br\/> $\\mathbb{N} \\subset \\mathbb{Z} \\subset \\mathbb{Q} \\subset \\mathbb{R} $ <br\/> Suy ra: N\u1ebfu a l\u00e0 m\u1ed9t s\u1ed1 h\u1eefu t\u1ec9 th\u00ec a c\u0169ng l\u00e0 m\u1ed9t s\u1ed1 th\u1ef1c. ($ \\mathbb{Q} \\subset \\mathbb{R}$) <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 D. <\/span><\/span> ","column":2}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:47"},{"id":"452","post_id":"1019","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":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" Bi\u1ebft r\u1eb1ng $x + (-4,5) < y + (-4,5) $ v\u00e0 $ y + 6,8 < z + 6,8 $ <br\/> S\u1eafp x\u1ebfp c\u00e1c s\u1ed1 theo th\u1ee9 t\u1ef1 t\u0103ng d\u1ea7n l\u00e0: ","select":["A. $x, y, z$","B. $y, x, z$","C. $z, x, y$","D. $x, z, y$"],"explain":" Ta c\u00f3: $x + (-4,5) < y + (-4,5) \\\\ \\Rightarrow x < y (1) $ <br\/> $ y + 6,8 < z + 6,8 \\Rightarrow y < z (2)$ <br\/> T\u1eeb (1) v\u00e0 (2) suy ra $x < y < z$ <br\/> V\u1eady s\u1eafp x\u1ebfp c\u00e1c s\u1ed1 \u0111\u00e3 cho theo th\u1ee9 t\u1ef1 t\u0103ng d\u1ea7n l\u00e0 $x, y, z.$ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 A. <\/span><\/span> ","column":2}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:47"},{"id":"453","post_id":"1019","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":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" <center><img src='img\/2.jpg' \/><\/center>","select":["A. $0,52(41) \\in \\mathbb{I}$ ","B. $\\mathbb{Q} \\subset \\mathbb{R}$ "],"explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span> <br\/> D\u1ef1a v\u00e0o kh\u00e1i ni\u1ec7m s\u1ed1 h\u1eefu t\u1ec9, s\u1ed1 v\u00f4 t\u1ec9, s\u1ed1 th\u1ef1c \u0111\u1ec3 v\u1eadn d\u1ee5ng gi\u1ea3i. <\/span> <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> 0,52(41) l\u00e0 s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n tu\u1ea7n ho\u00e0n n\u00ean $0,52(41) \\notin \\mathbb{I}$ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B <br\/> $\\mathbb{Q} \\subset \\mathbb{R}$ . <\/span><\/span> ","column":2}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:22:47"}]}