Let a function be defined as f(x) = c^x + c^-x2, for c > 0. What is the value of f(x + y) + f(x - y) ?

Let a function be defined as f(x) = c^x + c^-x2, for c > ...

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PS · Problem Solving

705-805

Functions

Let a function be defined as

f(x) = \frac{c^x + c^{-x}}{2}

, for

c > 0

. What is the value of

f(x + y) + f(x - y)

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705-805

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