1.

LetC_1 and C_2 be respectively, the parabolas x^2=y=-1 and y^2=x-1 Let P be any point on C_1 and Q be any point on C_2 . Let P_1 and Q_1 be the refelections of P and Q, respectively with respect to the line y=x. Arithemetic mean of PP_1and Q Q_1 is always less than

Answer»

PQ
`1/2`PQ
2PQ
`3/2`PQ

Answer :A


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