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Let f(x) = 5x + tanh(x), where tanh x = sinh x /cosh x , and...

Let f(x) = 5x + tanh(x), where tanh x = sinh x /cosh x , and sinh x and cosh x is defined in question 1(b). Given that f(x) is one-to-one, use the linear approximation of( f −1 )(x) around a = 0 to estimate( f −1 )(0.2)

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