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If `p` be the length of the perpendicular from the origin on the line `x//a+y//b` `=1,` then `p^2=a^2+b^2` b. `p^2=1/(a^2)+1/(b^2)` c. `1/(p^2)=1/(a^2)+1/(b^2)` d. none of these

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RD SHARMA ENGLISH-THE STRAIGHT LINES -All Questions
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