请看题目:5x2y|m|-14(m+1)y2+3是三次三项式,则m=。A.m=±1 B.m=1 C.m=1 D.以上都不正确这道题目是清华附中07-08学年期中考试题,随后多地中考选用了此题,有北京市、江苏等地,所给答案都一致选B.m=1。网络可以搜索到很多关于此题的解析,也都是选B.m=1。其解析过程为2+|m|=3m+1≠0嗓,m=1,选B。该解析认为多项式的次数为3,因此有2+|m|=3,m=±1;多 Look at the title: 5x2y | m | -14 (m + 1) y2 + 3 is cubic trinomial, then m =. Am = ± 1 Bm = 1 Cm = 1 D. The above is not correct This topic is Tsinghua Fuzhong 07-08 semester exam questions, then more than the test used this question, Beijing, Jiangsu and other places, the answer given The same choice Bm = 1. Network can search a lot of analysis on this issue, but also choose B.m = 1. The analytical process is 2+ | m | = 3m + 1 ≠ 0 voice, m = 1, choose B. This analysis considers the polynomial number to be 3, so there are 2 + | m | = 3, m = ± 1;