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Mathematics (11)

P(a, b) is a point in the first quadrant. If the two circles which pass through P and touch both the co-ordinate axes cut at right angles, then find condition in a and b.

a2 + 4ab + b2 = 0

a2 - 4ab + b2 = 0

a2 - 2ab + b2 = 0

a2 + 2ab + b2 = 0

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Correct Answer: C (a2 - 2ab + b2 = 0) C
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