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What is the value of P for which the vec...

What is the value of P for which the vector `p(2hat(i)-hat(j)+2hat(k))` is of 3 units length ?

A

1

B

2

C

3

D

6

Text Solution

Verified by Experts

The correct Answer is:
A
`|P(2hat(i)-hat(j)+2hat(k))|=3`
`P|sqrt(2^(2)+(-1)^(2)+2^(2))|=3`
`3P=3rArr P=1`
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NDA PREVIOUS YEARS-VECTORS -MATH
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  7. The vertices of a triangle ABC are A (2,3,1) , B(-2, 2,0), and C(0,1,-...

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