Question

If P and Q are two points whose coordinates are ( at2, 2at ) and ( a/t2,-2a/ta ) respectively and S is the point (a,0) , then show 1/SP+1/SQis independent of t.

Answer 1

because the value of 1/SA+1/SB=1/A
so it is independent on t
if u want the answer correct
u can replace the letter p and q