121= 1×11×11= 1×11=i nbsp;× nbsp;11 nbsp;[∵ nbsp;i nbsp;= nbsp; 1]=11i So, the value of nbsp; 121 nbsp;is 11i nbsp; ...

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The value of ...

Question

$T h e v a l u e o f \sqrt{- 121} i s$

-11i

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11i

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Solution

The correct option is B 11i
$\sqrt{- 121} = \sqrt{- 1 \times 11 \times 11} = \sqrt{- 1} \times 11 = i \times 11 [∵ i = \sqrt{- 1}] = 11 i$

So, the value of $\sqrt{- 121}$ is $11 i$

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