Given the derivative of a function, how would you find the original function?
I am trying to teach myself calculus, so I am asking this question. For example, given that the derivative of a function is 2x, you could use the d/dx [x^n] = (n)(x(n-1)) to guess that the original function was x2, but what would you do if you were told that x2 itself was the derivative of another function? Please help me. Note that I am NOT someone asking for homework help, my homework from school is not calculus.