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If Q(at1^2,2at1) and Q'(at2^2,2at2^2), t...

If `Q(at_1^2,2at_1) and Q'(at_2^2,2at_2^2),` then ordered pair `(t_1+t_2,t_1-t_2)` is (A) `((2t(t^2+2)tan^2alpha+1)/(1-t^2tan^2alpha) , (t^2-(t^2+2)^2tan^2alpha)/(1-t^2tan^2alpha))`

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