Math miscellaneousHard

Question

If y = (x + , then (1 + x2) is

Options

A.n2y
B.- n2y
C.- y
D.2x2y

Solution

y = (x +
= n (x + n -1
or Squaring, (1 + x2)y21 = n2y2
Differentiating, (1 + x2)2y1y2 + y12. 2x = n2 . 2yy1 (Here, y2 = ) or (1 + x2)y2 + xy1 = x2y

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