This is ambiguous notation. Do you mean
5th power of f(x)
5th derivative of f(x)
f(f(f(f(f(x)))))
Hard to say from what is here.
Define the function f(x)=2x/(1−x^2). Find the number of distinct real solutions of the equation f^(5)(x)=x.
2 answers
i mean f^(5)(x)=f(f(f(f(f(x))))).