if A=(t^2,2t),B=(1/t^2,-2/t) and S=(1,0) then 1/SA+1/SB is equal to

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A \equiv (t^{2}, 2 t), B \equiv (\frac{1}{t^{2}}, - \frac{2}{t}) a n d s \equiv (1, 0), t h e n \frac{1}{S A} + \frac{1}{S B} i s e q u a l t o

A = (a t^{2}, 2 a t), B = (\frac{a}{t^{2}}, - \frac{2 a}{t}), S (a, 0)

\frac{1}{S A} + \frac{1}{S B} =

A (a^{2}, 2 a) B (\frac{1}{a^{2}}, \frac{- 2}{a})

\frac{1}{S A} + \frac{1}{S B} = 1

S_{A} = 2 m + (2 m + 1) + (2 m + 2) + . . . + 4 m

S_{B} = (2 m + 1) + (2 m + 3) + (2 m + 5) + . . . + (4 m - 1),

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