A) ? 2/3
B) ? 4/3
C) ½
D) 2
Correct Answer: B
Solution :
Here, \[{{x}_{2}}-{{x}_{\grave{\ }1}}=2,\,{{y}_{2}}-{{y}_{1}}=-2,\,{{z}_{2}}-{{z}_{1}}=1\] Now, l, m, n for PQ are \[\frac{1}{3},\frac{2}{3},\,\frac{-2}{3}\] \[\therefore \] Projection of RS on PQ = \[\sum l({{x}_{2}}-{{x}_{1}})\] = \[\frac{2}{3}-\frac{4}{3}-\frac{2}{3}=\frac{-4}{3}\].You need to login to perform this action.
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