defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Circles Tangents and Normals

दो स्पर्श करने वाले वृत्तों x2 + y2 + 6x - 2y + 7 = 0 और x2 + y2 - 4x + 7y - 9 = 0 की उभयनिष्ठ स्पर्श रेखा है:

1
10x + 9y + 16 = 0
2
10x + 9y - 16 = 0
3
10x - 9y - 16 = 0
4
10x - 9y + 16 = 0
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