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If the circles x^2 + y^2 + 2ax + cy+ a =...

If the circles `x^2 + y^2 + 2ax + cy+ a = 0` and `x^2 + y^2 - 3ax + dy - 1 = 0` intersect in two distinct points P and Q, then the line 5x + by - a = 0 passes through P and Q for :

A

no value of `a`

B

exactly two values of `a`

C

infinitely many values of `a`

D

exactly one value of `a` (AIEEE 2005)

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The correct Answer is:
A
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HIMALAYA PUBLICATION-CIRCLES-QUESTION BANK
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