Problem

Problem

If ex=y+1+y2e^x = y + \sqrt{1+y^2}, then y=y = (a) ex+e−x2\frac{e^x + e^{-x}}{2} (b) ex−e−x2\frac{e^x - e^{-x}}{2} (c) ex+e−xe^x + e^{-x} (d) ex−e−xe^x - e^{-x}

Browse the problem library