举报
mu solution of no.6 is as follows:
(1-x6)/(1-x)-1/(1-x)=x6/(x-1)
when 0<x<1 , x6/(x-1)<0;
and when x>0 or x<1, x6/(x-1)>0.
As (1) and (2) are combined, the answer is 0<x<1. We can determine that x6/(x-1)<0 and c is correct.
第6题, 条件2一个就足够了吧. 我觉得是B.
X<1就成立了.
??
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