题目

设函数的最大值为. (1)求的值;(2)若正实数,满足,求的最小值. 答案:解:(Ⅰ)f(x)=|x+1|-|x|= 由f(x)的单调性可知,当x≥1时,f(x)有最大值1.所以m=1.      (Ⅱ)由(Ⅰ)可知,a+b=1,We give dogs time, space and love we can spare, and ____________, dogs give us their all.A.in charge B.in fact C.in case D.in return
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