The love of functions and derivatives

Those who studied high school mathematics electives 2-2 all gave me a point. The math teacher said: How many times have I said this?how many times?There are infinitely many derivative functions corresponding to the original functions!Do you need +C for indefinite integrals? !To translate this sentence is: there are thousands of functions of derivatives, and the derivatives of functions have only one answer.Various settings basically follow the national volume in the past ten years. Derivative attack × function is affected by atypical sand sculptures. There is a point in the later stage that I haven't learned the derivative, which does not affect the understanding of the full text, but there are some stalks that I can't get. cover