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Multiple Choice Questions

If be two vectors whose moduli are a and b respectively and they are such that is to and n...........

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If $\alpha ,\beta$ be two vectors whose moduli are a and b respectively and they are such that ( $\alpha +\beta$ ) is $\perp$ to $\beta$ and $\alpha$ is $\perp$ to 2 $\beta +\alpha$ , then

$a=b\sqrt{2}$

a=2b

a=b

2a=b

Explanation:

Step1: (a+b) . b = 0 solve this and

Step2: a . (2b+a) = 0 solve this

$a=b\sqrt{2}$ final answer.

By: Swaminath Yadav

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