Question

If the function $f: [1, \infty) \rightarrow [1,\infty)$ is defined by $f(x) = 2^{x (x-1)}$, then f⁻¹(x) is
$(a) (\frac{1}{2})^{x(x-1)}\\(b) \frac{1}{2} (1 + \sqrt{1 + 4log_2x})\\(c) \frac{1}{2} (1 - \sqrt{1 + 4log_2x})$
(d) not defined

Answer 1

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