1.

Prove that (e^2x + e^-x - e^x - 1)/(e^2x - e^-x +e^x - 1) = (e^x - 1)/(e^x +1).

Answer» Prove that (e^2x + e^-x - e^x - 1)/(e^2x - e^-x +e^x - 1) = (e^x - 1)/(e^x +1).


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