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If l " and " l' be the lengths of the s...

If ` l " and " l' `be the lengths of the segment `overline(PS)` and `overline (P'S)` of a focal chord `overline(PP')` of the parabola `y^(2) = 4ax ` , then show that `(1)/(l)+(1)/(l')=(1)/(a)` .

Text Solution

Verified by Experts

The correct Answer is:
`=(10)/(a)*(1+t^(2))/(1+t^(2)=(1))=(1)/(a)`
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