作业帮求值域；f{x}=x²-1分之x²-3x+2
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求值域；f{x}=x²-1分之x²-3x+2
求值域；f{x}=x²-1分之x²-3x+2
求值域；f{x}=x²-1分之x²-3x+2
x≠±1
f(x)=(x-1)*(x-2)/[(x+1)*(x-1)]
=(x-2)/(x+1)
=1-[3/(x+1)]
f(x)≠1