Chú ý: Để đảm bảo quyền lợi và bảo vệ tài khoản của mình
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{"common":{"save":0,"post_id":"6393","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6177","mon_id":"1158767","chapter_id":"1158861","post_id":"6393","question":"<p>Kh\u1eb3ng \u0111\u1ecbnh nào sau \u0111ây \u0111úng?<\/p>","options":["1. <span class=\"math-tex\">$\\overrightarrow{AB}+\\overrightarrow{AC}=\\overrightarrow{BC}$<\/span>","2. <span class=\"math-tex\">$\\overrightarrow{MP}+\\overrightarrow{NM}=\\overrightarrow{NP}$<\/span>","3. <span class=\"math-tex\">$\\overrightarrow{CA}+\\overrightarrow{BA}=\\overrightarrow{CB}$<\/span>","4. <span class=\"math-tex\">$\\overrightarrow{AA}+\\overrightarrow{BB}=\\overrightarrow{AB}$<\/span>"],"correct":"2","level":"1","hint":"<p>Áp d\u1ee5ng quy t\u1eafc c\u1ed9ng 3 \u0111i\u1ec3m.<\/p>","answer":"<p><span style=\"color:#27ae60;\"><strong>\u0110áp án \u0111úng là <\/strong>2. <span class=\"math-tex\">$\\overrightarrow{MP}+\\overrightarrow{NM}=\\overrightarrow{NP}$<\/span><\/span><\/p><p>Theo quy t\u1eafc c\u1ed9ng 3 \u0111i\u1ec3m ta có :<\/p><p> <span class=\"math-tex\">$\\overrightarrow{NM}+\\overrightarrow{MP}=\\overrightarrow{NP}\\Rightarrow \\overrightarrow{MP}+\\overrightarrow{NM}=\\overrightarrow{NP}$<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-12-27 08:43:31","option_type":"math","len":0},{"id":"6178","mon_id":"1158767","chapter_id":"1158861","post_id":"6393","question":"<p>Cho <span class=\"math-tex\">$\\overrightarrow{a}$<\/span> và <span class=\"math-tex\">$\\overrightarrow{b}$<\/span> là các véc t\u01a1 khác <span class=\"math-tex\">$\\overrightarrow{0}$<\/span> v\u1edbi <span class=\"math-tex\">$\\overrightarrow{a}$<\/span> là véc t\u01a1 \u0111\u1ed1i c\u1ee7a <span class=\"math-tex\">$\\overrightarrow{b}$<\/span> . Kh\u1eb3ng \u0111\u1ecbnh nào sau \u0111ây<strong> sai<\/strong>?<\/p>","options":["A. Hai véc t\u01a1 <span class=\"math-tex\">$\\overrightarrow{a},\\overrightarrow{b} $<\/span> cùng ph\u01b0\u01a1ng.","B. Hai véc t\u01a1 <span class=\"math-tex\">$\\overrightarrow{a},\\overrightarrow{b} $<\/span> ng\u01b0\u1ee3c h\u01b0\u1edbng ph\u01b0\u01a1ng","C. Hai véc t\u01a1 <span class=\"math-tex\">$\\overrightarrow{a},\\overrightarrow{b} $<\/span> cùng \u0111\u1ed9 dài","D. Hai véc t\u01a1 <span class=\"math-tex\">$\\overrightarrow{a},\\overrightarrow{b} $<\/span> chung \u0111i\u1ec3m \u0111\u1ea7u"],"correct":"4","level":"1","hint":"<p>Hai véc t\u01a1 \u0111\u1ed1i nhau có th\u1ec3 không chung \u0111i\u1ec3m \u0111\u1ea7u. <\/p><p>Hai véc t\u01a1 \u0111\u1ed1i nhau n\u1ebfu chúng ng\u01b0\u1ee3c h\u01b0\u1edbng và có cùng \u0111\u1ed9 dài<\/p><p>Hai véc t\u01a1 \u0111\u1ed1i nhau thì ng\u01b0\u1ee3c h\u01b0\u1edbng nhau nên chúng cùng ph\u01b0\u01a1ng.<\/p>","answer":"<p><span style=\"color:#27ae60;\"><\/span>\u0110áp án sai c\u1ea7n ch\u1ecdn là<strong> <\/strong><span style=\"color:#e74c3c;\">D. Hai véc t\u01a1 <span class=\"math-tex\">$\\overrightarrow{a},\\overrightarrow{b} $<\/span> chung \u0111i\u1ec3m \u0111\u1ea7u<\/span><span style=\"color:#27ae60;\"><\/span><\/p><p><span style=\"color:#27ae60;\"><\/span>Hai véc t\u01a1 \u0111\u1ed1i nhau có th\u1ec3 không chung \u0111i\u1ec3m \u0111\u1ea7u. <\/p><p>Hai véc t\u01a1 \u0111\u1ed1i nhau n\u1ebfu chúng ng\u01b0\u1ee3c h\u01b0\u1edbng và có cùng \u0111\u1ed9 dài<\/p><p>Hai véc t\u01a1 \u0111\u1ed1i nhau thì ng\u01b0\u1ee3c h\u01b0\u1edbng nhau nên chúng cùng ph\u01b0\u01a1ng.<\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-12-27 08:48:23","option_type":"math","len":0},{"id":"6179","mon_id":"1158767","chapter_id":"1158861","post_id":"6393","question":"<p>Cho 3 \u0111i\u1ec3m phân bi\u1ec7t <span class=\"math-tex\">$A,B,C$<\/span> . \u0110\u1eb3ng th\u1ee9c nào sau \u0111ây <strong>\u0111úng<\/strong>?<\/p>","options":["<strong>A. <\/strong> <span class=\"math-tex\">$\\overrightarrow{CA}-\\overrightarrow{BA}=\\overrightarrow{BC}$<\/span> ","<strong>B. <\/strong> <span class=\"math-tex\">$\\overrightarrow{AB}+\\overrightarrow{AC}=\\overrightarrow{BC}$<\/span> ","<strong>C. <\/strong> <span class=\"math-tex\">$\\overrightarrow{AB}+\\overrightarrow{CA}=\\overrightarrow{CB}$<\/span> ","<strong>D. <\/strong><span class=\"math-tex\">$\\overrightarrow{AB}+\\overrightarrow{BC}=\\overrightarrow{CA}$<\/span> ."],"correct":"3","level":"1","hint":"<p>Áp d\u1ee5ng quy t\u1eafc c\u1ed9ng 3 \u0111i\u1ec3m.<\/p>","answer":"<p><span style=\"color:#27ae60;\"><strong>\u0110áp án \u0111úng là C. <\/strong> <span class=\"math-tex\">$\\overrightarrow{AB}+\\overrightarrow{CA}=\\overrightarrow{CB}$<\/span> <\/span><\/p><p>Theo quy t\u1eafc c\u1ed9ng 3 \u0111i\u1ec3m <span class=\"math-tex\">$\\overrightarrow{CA}+\\overrightarrow{AB}=\\overrightarrow{CB}\\Rightarrow\\overrightarrow{AB}+\\overrightarrow{CA}=\\overrightarrow{CB}$<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-12-27 08:52:29","option_type":"math","len":0}]}