Mathematics - Ellipse Question with Solution | TestHub

$\frac{x^2}{144}-\frac{y^2}{81}=\frac{1}{25}$ $\mathrm{a}=\sqrt{\frac{144}{25}},\mathrm{b}=\sqrt{\frac{81}{25}},\mathrm{e}=\sqrt{1+\frac{81}{144}}=\frac{15}{12}=\frac{5}{4}$ Foci $=(3,0)$, focus of ellipse $=(3,0)\Rightarrow \mathrm{e}=\frac{3}{4}$ $b^2=16\left(1-\frac{9}{16}\right)=7$