Let a,b∈R . If the mirror image of the point Pa,6,9 with respect to the line x−37=y−25=z−1−9 is , then a+bis equal to

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answer is B.

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Detailed Solution

Mid point ⇒a+202,b+62,−a2is locate d on line ] 7a−20+56−b+−918+a=0a+5b+272=0a+20−614=b+6−410=−a+218 a+1418=14a+2 4a+14×16=0a=−56b=−32 a+b=88

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