Q.
If a variable line drawn through the intersection of the lines x3+y4=1 and x4+y3=1, meets the coordinates axes at A and B, (A≠B), then the locus of the midpoint of AB is
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a
6xy=7x+y
b
7xy=6x+y
c
4(x+y)2−28(x+y)+49=0
d
14(x+y)2−97(x+y)+168=0
answer is B.
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Detailed Solution
Point of intersection 127,127 required line is X2x1+Y2y1=1
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