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28. Let a variable line drawn from A(h,k) intersects the ellipse x+2y=1 at P and Q. The tangents at P and Q intersects at R and the locus of R is βx+(β+1)y=1. Find the values of β such that point A lies inside the ellipse |
| Answer» 28. Let a variable line drawn from A(h,k) intersects the ellipse x+2y=1 at P and Q. The tangents at P and Q intersects at R and the locus of R is βx+(β+1)y=1. Find the values of β such that point A lies inside the ellipse | |