当x→0时,f(x)=x-sinax与g(x)=x2ln(1-bx)是等价无穷小,则( ).
A、<img src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/dcf04486-7559-4e81-b3d1-f23f2c2932f8.png" width="87" height="19">
B、<img src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/093ba3ad-3fd3-4293-8e8f-35fc4588ddd5.png" width="79" height="19">
C、<img src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/8d60436d-7d6c-4268-8935-b2711b841b28.png" width="96" height="19">
D、<img src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/88065cfb-fbeb-4ae1-b1b3-724da50d33d4.png" width="87" height="19">
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