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P,Q,R,S are the points (1,2,-2), (8,10,1...

P,Q,R,S are the points `(1,2,-2), (8,10,11), (1,2,3) and (3,5,7)` respectively. If s denotes the projection of PQ on RS then `29s^(2) + 29` is equal to :

A

2195

B

8129

C

3100

D

2500

Text Solution

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The correct Answer is:
B
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