Teaching DSSSB TGT Mock Test 2025 Mathematics Parabola, Ellipse and Hyperbola Parabola

If the line lx + my + n = 0 touches the parabola y2 = x, then

1
lmn = 1
2
n2 = 4 lm
3
l2 = mn
4
m2 = 4 ln
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