JEE MATHEMATICS MCQ: CIRCLES

1 Easy

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Analyzing +4 | -1

If the circles

{x^2} + {y^2} + 2gx + 2fy = 0

and

{x^2} + {y^2} + 2g'\,x + 2f'\,y = 0

touch each other, then

View answer and explanation

Correct option: D

f\mathrm{g'} = f'\mathrm{g}

Option D (

f\mathrm{g'} = f'\mathrm{g}

) is correct because the circles touch each other if they have the same tangent at the origin.

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\gamma

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9 \pi