If and , then is equal to, where…

MATHEMATICS · Single correct · CBSE · Mathematics · Complex Numbers and Quadratic Equations · Complex Numbers and Quadratic Equations

Problem

If

a>0

and

b<0

, then

\sqrt{a}\sqrt{b}

is equal to, where

i=\sqrt{-1}

: (1)

-\sqrt{a\cdot|b|}

(2)

\sqrt{a|b|}\,i

(3)

\sqrt{a\cdot|b|}

(4) None of these

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