f(x)=5f(x)=5f(x)=5
f(x)=5−xx−2f(x)=\frac{5-x}{x-2}f(x)=x−25−x
f(x)=x2−1x2+1f(x)=\frac{x^{2}-1}{x^{2}+1}f(x)=x2+1x2−1
f(x)=ex+1ex−1f(x)=\frac{e^{x}+1}{e^{x}-1}f(x)=ex−1ex+1
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