AP and TS EAMCET Engineering Model Paper 1
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Question : 65 of 160
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If the circle x 2 + y 2 + 8 x − 4 y + c = 0 touches the circle x 2 + y 2 + 2 x + 4 y − 11 = 0 externally and cuts the circle x 2 + y 2 − 6 x + 8 y + k = 0 orthogonally then k =
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