[1QN] Let \(f:[0,1]ββ\) be a function \(C^ 2\) such that \(f(0)=f(1)=0\) and \(f'(x)=f(x)f''(x)\) for every \(xβ[0,1]\).
Prove that the function \(f\) is identically zero.
[1QP]βΊβ»