1.

A : Ifx^(2) + y^(2) - 2x + 3y + k = 0 , x^(2) + y^(2) + 8x 0 6y - 7 = 0cut each other orthogonally then k = 10 . R : The circlesx^(2) + y^(2) + 2gx + 2fy + c = 0 , x^(2) + y^(2) + 2g'x + 2f'y + c' = 0cut each other orthogonally iff2gg' + 2ff'= c + c'

Answer»

Both A and R are true and R is the correct EXPLANATION of A
Both A and R are true but R is not CORRCET explanation of A
A is true but R is FALSE
A is false but R is true .

Answer :A::D


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