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If a = 2 hat(i) - hat(j) - m hat(k) and ...

If `a = 2 hat(i) - hat(j) - m hat(k)` and `b = (4)/(7)hat(i) - (2)/(7)hat(j) + 2hat(k)` are collinear, then the value of m is equal to a)`-7` b)`-1` c)2 d)7

A

`-7`

B

`-1`

C

2

D

7

Text Solution

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The correct Answer is:
A
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