If the circle `x^2 + y^2 + 8x-4y + c = 0` touches the circle `x^2 +y^2 +2x +4y -11- 0` external...
1,353 views · Published 12 October 2018 · 5:31 · Indexed 2 October 2026
Channel: Doubtnut · 2018 · Education
To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW If the circle `x^2 + y^2 + 8x-4y + c = 0` touches the circle `x^2 +y^2 +2x +4y -11- 0` externally and cuts the circle x2 + y2-6x + 8y + k = 0 orthogonally then k= A) 59 42. -59 C) 19 D) -19
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