{"common":{"save":0,"post_id":"4817","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8554","post_id":"4817","mon_id":"1158113","chapter_id":"1158117","question":"<p>Vi\u1ebft tích sau d\u01b0\u1edbi d\u1ea1ng l\u0169y th\u1eeba, v\u1edbi b∈N<\/p><p>b . b . b . b . b . b . b . b . b . b<\/p>","options":["b<span class=\"math-tex\">$^{11}$<\/span>","b<span class=\"math-tex\">$^{10}$<\/span>","10 . b"],"correct":"2","level":"3","hint":"<p>L\u0169y th\u1eeba b\u1eadc n c\u1ee7a s\u1ed1 t\u1ef1 nhiên a là tích c\u1ee7a n th\u1eeba s\u1ed1 b\u1eb1ng nhau, m\u1ed7i th\u1eeba s\u1ed1 b\u1eb1ng a:<\/p><p>a<span class=\"math-tex\">$^n$<\/span> = a . a . ... . a (có n th\u1eeba s\u1ed1 a, n∈<span class=\"math-tex\">$\\mathbb{N}^*$<\/span>)<\/p>","answer":"<p>Ta th\u1ea5y có 10 th\u1eeba s\u1ed1 b\u1eb1ng b nên <\/p><p>b . b . b . b . b . b . b . b . b . b = b<span class=\"math-tex\">$^{10}$<\/span><\/p><p>V\u1eady \u0111áp án \u0111úng là <span style=\"color:#16a085;\"><strong>b<span class=\"math-tex\">$^{10}$<\/span><\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"1","date":"2021-10-06 12:29:23","option_type":"math","len":0},{"id":"8556","post_id":"4817","mon_id":"1158113","chapter_id":"1158117","question":"<p>Vi\u1ebft các tích sau d\u01b0\u1edbi d\u1ea1ng l\u0169y th\u1eeba c\u1ee7a 5?<\/p><p>5 . 5 . 25 . 5 . 125 = ?<\/p>","options":["5<span class=\"math-tex\">$^7$<\/span>","5<span class=\"math-tex\">$^9$<\/span>","5<span class=\"math-tex\">$^8$<\/span>"],"correct":"3","level":"3","hint":"<p>Khi nhân hai l\u0169y th\u1eeba cùng c\u01a1 s\u1ed1, ta gi\u1eef nguyên c\u01a1 s\u1ed1 và c\u1ed9ng các s\u1ed1 m\u0169 v\u1edbi nhau:<\/p><p>a<span class=\"math-tex\">$^m$<\/span> . a<span class=\"math-tex\">$^n$<\/span> = a<span class=\"math-tex\">$^{m+n}$<\/span><\/p><p>Vi\u1ebft 25 = 5<span class=\"math-tex\">$^2$<\/span> và 125 = 5<span class=\"math-tex\">$^3$<\/span> <\/p>","answer":"<p> 5 . 5 . 25 . 5 . 125<\/p><p>= 5 . 5 . 5<span class=\"math-tex\">$^2$<\/span> . 5 . 5<span class=\"math-tex\">$^3$<\/span> <\/p><p>= 5<span class=\"math-tex\">$^{1 +1+2+1+3}$<\/span> <\/p><p>= 5<span class=\"math-tex\">$^8$<\/span><\/p><p>V\u1eady \u0111áp án \u0111úng là <span style=\"color:#16a085;\"><strong> 5<span class=\"math-tex\">$^8$<\/span><\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"1","date":"2021-10-06 12:33:35","option_type":"math","len":0},{"id":"8557","post_id":"4817","mon_id":"1158113","chapter_id":"1158117","question":"<p>K\u1ebft qu\u1ea3 c\u1ee7a phép tính<\/p><p>2<span class=\"math-tex\">$^3$<\/span> . 3<span class=\"math-tex\">$^2$<\/span> = ?<\/p>","options":["72","36","24"],"correct":"1","level":"3","hint":"<p>L\u0169y th\u1eeba b\u1eadc n c\u1ee7a s\u1ed1 t\u1ef1 nhiên a là tích c\u1ee7a n th\u1eeba s\u1ed1 b\u1eb1ng nhau, m\u1ed7i th\u1eeba s\u1ed1 b\u1eb1ng a:<\/p><p>a<span class=\"math-tex\">$^n$<\/span> = a . a . ... . a (có n th\u1eeba s\u1ed1 a, n∈<span class=\"math-tex\">$\\mathbb{N}^*$<\/span>)<\/p>","answer":"<p>2<span class=\"math-tex\">$^3$<\/span> . 3<span class=\"math-tex\">$^2$<\/span> = 8 . 9 = 72<\/p><p>V\u1eady \u0111áp án \u0111úng là <span style=\"color:#16a085;\"><strong>72<\/strong><\/span><\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"132","test":"1","date":"2021-10-06 12:36:18","option_type":"txt","len":0}]}