JEE MATHEMATICS MCQ: SYSTEM OF CIRCLES

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Application +4 | -1

If the circle

{x^2} + {y^2} + 4x + 22y + c = 0\;\;

bisects the circumference of the circle

{x^2} + {y^2} - 2x + 8y - d = 0

, then

c + d

is equal to

View answer and explanation

Correct option: B

Option B (50) is correct because the sum c+d is found by using the fact that the common chord passes through the center of the second circle.

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