" 19.If "f(x)=(x-1)/(x+1)," Then prove that "f(2x)=3f(x)+(1)/(f(x))+3

If ‘f’ is a real function defined by : f(x)= (x-1)/(x+1) , then prove that f (2x) = (3 f(x)+1)/(f(x)+3) .

If f is a real function defined by f(x)=(x-1)/(x+1) , then prove that f(2 x)=(3f(x)+1)/(f(x)+3) .

If f is a real function defined by f(x)=(x-1)/(x+1), then prove that f(2x)=(3f(x)+1)/(f(x)+3)

If f is a real function defined by f(x)=(x-1)/(x+1) , then prove that f(2x)=(3f(x)+1)/(f(x)+3)

Let (x) is a real function, defines as f(x) =(x-1)/(x+1), then prove that f(2x)=(3f(x)+1)/(f(x)+3).

Let (x) is a real function, defines as f(x) =(x-1)/(x+1), then prove that f(2x)=(3f(x)+1)/(f(x)+3).

ff(x)=x+(1)/(x), thenprovethat [f(x)]^(3)=f(x^(3))+3f((1)/(x))

If f(x)=(1-x)/(1+x), prove that f[f{f(1/x)}]=-f(x)

If f(x)=3^(x) , then prove that f(x + 1) = 9f(x - 1).

If f(x) = (x-1)/(x+1) , then prove that (f(x)-f(y))/(1+f(x)f(y))=(x-y)/(1+xy) .