A) \[x=3\]
B) \[y=6\]
C) \[7x-12y-21=0\]
D) \[7x+12y+21=0\]
Correct Answer: A
Solution :
Let S1 º x2 + y2 ? 2x + 6y + 6 = 0 and S2 º x2 + y2 ? 5x + 6y + 15 = 0, then common tangent is S1 ? S2 = 0 Þ 3x = 9 Þ x = 3.You need to login to perform this action.
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