Let x, y, z be positive real numbers such that x, y, z are in GP and tan-1 x, tan-1 y and tan-1 z are in AP. Then which one of the following is correct?

Let x, y, z be positive real numbers such that x, y, z are in GP and t

1.	Let x, y, z be positive real numbers such that x, y, z are in GP and tan-1 x, tan-1 y and tan-1 z are in AP. Then which one of the following is correct?
A.	x = y = z
B.	xz = 1
C.	x ≠ y and y = z
D.	x = y and y ≠ z
Answer» B. xz = 1

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Let x, y, z be positive real numbers such that x, y, z are in GP and tan-1 x, tan-1 y and tan-1 z are in AP. Then which one of the following is correct?

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