Find the distance between the points (at1^2,2at1) (a/t1^2,-2a/t1)
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We have,
AB= (a t2² −a t1² )² +(2a t2−2a t1 )²
⇒AB √[a ²(t 2 −t 1 )² (t 2 +t 1 ) ²+4a² (t 2−t 1 ) ²]
⇒AB=a(t 2 −t 1 ) √[(t 2 +t 1 ) ² +4]
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