Category : JEE Main & Advanced
The equation of the chord of the ellipse \[\frac{{{x}^{2}}}{{{a}^{2}}}+\frac{{{y}^{2}}}{{{b}^{2}}}=1,\]whose mid point be \[({{x}_{1}},{{y}_{1}})\] is \[T={{S}_{1}}\]
where \[T=\frac{x{{x}_{1}}}{{{a}^{2}}}+\frac{y{{y}_{1}}}{{{b}^{2}}}-1\], \[{{S}_{1}}=\frac{x_{1}^{2}}{{{a}^{2}}}+\frac{y_{1}^{2}}{{{b}^{2}}}-1\].
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