Question

The number √2 (e)^(iπ) is
(A) a rational number
(c) an imaginury number
(B) an irrational number
(D) none of the above​

Answer 1

Step-by-step explanation:

$\sqrt{2} {e}^{i\pi} \\ = \sqrt{2} ( \cos(\pi) + i \sin(\pi) ) \\ = \sqrt{2} ( - 1 + 0i) = - \sqrt{2}$

It is an irrational number.

The answer of option C.

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