JEE MATHEMATICS MCQ: CIRCLES

1 Easy

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Analyzing +4 | -1

If one of the circles

x^2+y^2+2 a x+c=0

and

x^2+y^2+2 b x+c=0

lies within the other, then

View answer and explanation

Correct option: A

ab > 0,c > 0

Option A (

ab > 0, c > 0

) is correct because for one circle to lie within the other, their intersection points must be imaginary and the origin must be outside both circles.

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9 \pi