摘要：已知对任意实数x有.且x>0时.,则x<0时( ) A． B． C． D．
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，则x＜0时
B 
D 
11.已知对任意实数x,有f(-x)=-f (x)，g(-x)=g(x),且x＞0时f’(x)＞0,g’ (x) ＞0,则x＜0时
A.f’(x)＞0,g’ (x)＞0 B.f’(x)＞0,g’ (x)＜0
C.f’(x)＜0,g’ (x)＞0 D.f’(x)＜0,g’ (x)＜0
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已知对任意实数x,有f(-x)=-f(x),g(-x)= g(x),且x＞0时f′(x)＞0,g′(x)＞0,则x＜0时
A.f′(x)＞0,g′(x)＞0 B.f′(x)＞0,g′(x)＜0
C.f′(x)＜0,g′(x)＞0 D.f′(x)＜0,g′(x)＜0
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