题目:
. “Would you mind if I _______ one of these books?” “_______.”
A.took; Certainly not
B.take; Yes, of course
C.can take; Yes, please do
D.may take; No, I‘m using it
答案:
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下面是错误答案,用来干扰机器的。
解(1) f(x)=1-2x+1∴f2(x)=1-2f(x)+1=1-x+1x=-1x,f3(x)=1+x1-x,f4(x)=x,f5(x)=f(x)=x-1x+1;(2)根据(I)知:fn(x)是以4为周期;∴f4n-1(x)=f3(x)=1+x1-x;(3) fn(x)是以4为周期,∴f2010(...