Teaching Haryana (HPSC) PGT Mock Test 2024 Mathematics Circles

If the circle x2 + y2 + 2gx + 2fy + c = 0 (c > 0) touches the y-axis, then which one of the following is correct?

1
g = √c only
2
g = ± √c
3
f = √c only
4
f = ± √c
5
Question Not Attempted
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