Mathematics · Coordinate Geometry
If the circle S = 0 intersects the three circles S1 ≡ x2 + y2 + 4x - 7 = 0, S2 ≡ x2 + y2 + y = 0, and S3 ≡ x2 + y2 + (3/2)x + (5/2)y - 9/2 = 0 orthogonally, then the radical axis of S = 0 and S1 = 0 is:
- 14x + y - 3 = 0✓
- 2x + y - 3 = 0
- 34x - y - 7 = 0
- 4x - y - 2 = 0
Correct answer
4x + y - 3 = 0
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