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If first two numbers of the direction co...

If first two numbers of the direction cosines of a line joining points (1,2,0) and (3,-1,z) are `(2/7),-(3/7)` then `z` is equal to

A

5

B

`pm6`

C

`pm3`

D

`pm4`

Text Solution

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The correct Answer is:
B
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