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f(x)=ex+e−xex−e−x\large f(x)=\frac{e^x+e^{-x}}{e^x-e^{-x}} f(x)=ex−e−xex+e−x
Suppose we define the function f(x)f(x) f(x) as above. If f(a)=53f(a)=\frac{5}{3}f(a)=35 and f(b)=75,f(b)=\frac{7}{5},f(b)=57, what is the value of f(a+b)?f(a+b)?f(a+b)?
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