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If a straight line is given by vecr = (1...

If a straight line is given by `vecr = (1+ t) hati + 3 t hatj + (1-t) hatk` where `l in R.` If this line lies in the plane `x + y + cz = d` then the value of `c +d ` is

A

`-1`

B

1

C

7

D

9

Text Solution

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The correct Answer is:
D
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