If p is the length of the perpendicular form the focus S of the ellipse \[\frac{{{x}^{2}}}{{{a}^{2}}}+\frac{{{y}^{2}}}{{{b}^{2}}}=1\] to a tangent at a point P on the ellipse, then \[\frac{2a}{SP}-1=\]

\[\frac{{{a}^{2}}}{{{p}^{2}}}\]

\[\frac{{{b}^{2}}}{{{p}^{2}}}\]

\[\frac{{{a}^{2}}+{{b}^{2}}}{{{p}^{2}}}\]

If p is the length of the perpendicular form the focus S of the ellips

1.	If p is the length of the perpendicular form the focus S of the ellipse \[\frac{{{x}^{2}}}{{{a}^{2}}}+\frac{{{y}^{2}}}{{{b}^{2}}}=1\] to a tangent at a point P on the ellipse, then \[\frac{2a}{SP}-1=\]
A.	\[\frac{{{a}^{2}}}{{{p}^{2}}}\]
B.	\[\frac{{{b}^{2}}}{{{p}^{2}}}\]
C.	\[{{p}^{2}}\]
D.	\[\frac{{{a}^{2}}+{{b}^{2}}}{{{p}^{2}}}\]
Answer» C. \[{{p}^{2}}\]

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If p is the length of the perpendicular form the focus S of the ellipse \[\frac{{{x}^{2}}}{{{a}^{2}}}+\frac{{{y}^{2}}}{{{b}^{2}}}=1\] to a tangent at a point P on the ellipse, then \[\frac{2a}{SP}-1=\]

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