Find the first three nonzero terms of the Maclaurin expansion of the given function.f(x) = ex + e-x

A. 2 + x2 + x4 + ...
B. x - x2 + x3 - ...
C. 2x + x3 + x5 + ...
D. x + x3 + x5 + ...

Answer: A

Mathematics

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