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Question: Answered & Verified by Expert
If (2, a) does not lie outside the circles x2+y2=13 and x2+y2+x-2y=14, then a lies in
MathematicsCircleTS EAMCETTS EAMCET 2021 (05 Aug Shift 1)
Options:
  • A (-, -3)(4, )
  • B [-3, 4]
  • C (-, -1)(3, )
  • D [-2, 3]
Solution:
1836 Upvotes Verified Answer
The correct answer is: [-2, 3]

 For 2,a to lie inside or on the circle x2+y2=13

22+a2=130

a+3a-30

a-3,3              .....i

 For 2,a to lie inside or on the circle x2+y2+x-2y=14

22+a2+2-2a-140

a2-2a-80

a+2a-40

a-2,4              .....ii

From i & ii

a-2,3

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