IF P and Q are two points whose coordinates are ( at2,,2at) and ( a/t2 , - 2a/t) respectively and S is the point ( a,0).. Show that 1/SP + 1/SQ is independent of t

Hi Aris!
Here is the answer to your question.
 
 
Hence, proved
 
Hope! This will help you.
Cheers!!!

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