题目

—Oh, the box is too heavy (重的) for me. —Let me ______you. A . to help B . helping C . help D . helps 答案:C已知f(x)是定义在[-1,1]上的奇函数.当a、b∈[-1,1],且a+b≠0时,有. (Ⅰ)判断函数f(x)的单调性,并给以证明; (Ⅱ)若f(1)=1且f(x)≤-2bm+1对所有x∈[-1,1],b∈[-1,1]恒成立,求实数m的取值范围.  
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