A straight line passes through the focus of a conic and meets the conic at P and Q. Prove that 1/|PF| + 1/|QF| is the same regardless of the choice of line.
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What is F in this case? And I guess you mean a conic section (?).
Originally Posted by TriKri What is F in this case? And I guess you mean a conic section (?). F is the focus
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