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If hat(i)+2hat(j)+nhat(k) is perpendicul...

If `hat(i)+2hat(j)+nhat(k)` is perpendicular to `4hat(i)+2hat(j)+2hat(k)` then find the value of n ?

Text Solution

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`(1hat(i) +2hat(j)+nhat(k)).(4hat(i)+2hat(j)+ 2hat(k))=0`
`4+4+n(2)=0rArrn=-4`
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