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[P(1,2,-2),Q(8,10,11),R(1,2,3),S(3,],[5,...

[P(1,2,-2),Q(8,10,11),R(1,2,3),S(3,],[5,7)" if "lambda" denotes the length of "],[" projection of "PQ" on "RS" then "],[29 lambda^(2)+29=],[" (A) "8100],[" (B) "8029],[" (C) "8129],[" (D) "90]

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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 :

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