f(x)=x-1,g(x)=x方-1,则f[g(-2)]=
题目
f(x)=x-1,g(x)=x方-1,则f[g(-2)]=
答案
因为 g(x) = x^2 -1
所以g(-2) =(-2)^2 - 1 = 3
所以f[g(-2)] = f(3) = 3 - 1 = 2
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