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The number of common tangents to the circles x2 + y2 = 4 and x2 + y2 − 6x − 8y = 24 is (1) 0 (2) 1 (3) 3 (4) 4 |
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Answer» Correct Option (2) 1 Explanation: x2 + y2 = 22 and (x − 3)2 + (y − 4)2 = 72 touch internally, d = r1 − r 2 = 5 Number of common tangents = 1 |
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