If `(y-z)prop1/x, (z-x)prop and (x-y)prop1/z,` then find the sum of three variation constants .

If x prop y, y prop z and z prop x, then find the product of three non-zero variation constant.

If x prop y, y prop z and z prop x , find the product of three variation constant.

If x^2 prop yz ,y^2 prop zx and z^2 prop xy , then find the product of three variation constant

If a prop b, b prop c and c prop a , then find the product of three non-zero variation constants.

If x prop yz and y prop zx, then prove that z is a non- zero variation constant.

If a prop1/b , then

If x prop (y+z) , y prop (z+x) and z prop(x+y) and if k, l and m are the variation constants of them respectively , then prove that (k)/(k+1) +(l)/(l+1) +(m)/(m+1) =1 .

If (b - c) prop bc, (c - a) prop ca and (a - b) prop ab where k,l,m are the respective variation constants, then___

If x prop 1/y and y prop 1/z , then x prop ……………

if x prop z and y prop z , then xy prop z .