f(x)=2x-1,g(x)=x²+1,则f[g(x)]=_,g[f(x)]=_.

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f(x)=2x-1,g(x)=x²+1,则f[g(x)]=_____,g[f(x)]=_____.f(x)=2x-1,g(x)=x²+1,则f[g(x)]=_____,g[f(x)

f(x)=2x-1,g(x)=x²+1,则f[g(x)]=_____,g[f(x)]=_____.
f(x)=2x-1,g(x)=x²+1,则f[g(x)]=_____,g[f(x)]=_____.

f(x)=2x-1,g(x)=x²+1,则f[g(x)]=_____,g[f(x)]=_____.
f[g(x0]
=2(x²+1)-1
=2x²+1
g[f(x)]
=(2x-1)²+1
=4x²-4x+2

f(x)=2x-1,g(x)=x²+1,则f[g(x)]=_2x²+1____,g[f(x)]=__4x²-4x+2___。

f(g(x))=2g(x)-1=2×(x²+1)-1=2x²+1

g(f(x))=[f(x)]²+1=(2x-1)²+1=4x²-4x+2