If `(x+y)/(1-xy),y,(y+z)/(1-yz)` be in A.P., " then " `x,(1)/(y),z` will be in

If x,y,z are in A. P. then (1)/(yz) , (1)/(zx), (1)/(xy) are in-

If (1)/(x) , (1)/(y) , (1)/(z) are A.P. show that (y+z)/(x) , (z+x)/(y) , (x+y)/(z) are in A.P.

If tan^(-1)x,tan^(-1)y,tan^(-1)z are in A.P then (2y)/(1-y^(2))=

If x,y , z are in A.P then (x-y)/(y-z) is equal to _________-

If (1)/(x) , (1)/(y) , (1)/(z) are A.P. show that xy,zx,yz are in A.P.

Let a(a != 0) is a fixed real number and (a-x)/(p x) = (a-y)/(qy) = (a-z)/(r z) . If p, q, r are in A.P., show that (1)/(x), (1)/(y), (1)/(z) are in A.P.

If tan^(-1)x,tan^(-1)y,tan^(-1)z are in A.P the (2y)/(1-y^(2))=

If xy + yz + zx = 1 find (x+y)/(1-xy) + (y+z)/(1-yz) + (z + x)/(1-zx) = ?