If $\mathrm{p}$ is the length of the perpendicular from origin to the whose intercepts on the axes are $a$…
- $\mathrm{p}^2$
- $\frac{1}{2 p^2}$
- $2 \mathrm{p}^2$
- $\frac{1}{\mathrm{p}^2}$
Solution
Equation of given line is
Distance of line (1) from origin is
$\begin{aligned}
& \frac{|-a b|}{\sqrt{a^2+b^2}}=p \quad \Rightarrow a^2+b^2=\frac{a^2 b^2}{p^2} \\
& \therefore \frac{a^2+b^2}{a^2 b^2}=\frac{1}{p^2} \Rightarrow \frac{1}{a^2}+\frac{1}{b^2}=\frac{1}{p^2}
\end{aligned}$Asked in: MHT CET 2021 (21 Sep Shift 2)