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Question

find the equation of the locus of the point p,if the points a(1,2),b(3,4) are at equal distances from p

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Solution

Let the coordiantes of P be h,kGiven:The coordinates of A1,2 and B 3,4A.T.QAP=BPh-12+k-22=3-h2+4-k2 using distance formulah-12+k-22=3-h2+4-k2h2+1-2h+k2+4-4k=9+h2-6h+16+k2-8k1-2h+4-4k=9-6h+16-8k5-2h-4k=25-6h-8k-2h+6h-4k+8k=204h+4k=20h+k=5Now replacing h by x, and k by y, we get, x+y = 5.

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