The topic X 2+1 means X plus the square of1.

2. The derivative is 2x. The derivative of the constant is zero. The derivation of the power is to multiply the power first and then subtract the power 1. As shown in the example, the quadratic power of x equals 2x.

3. What about indefinite integral? It is the reciprocal of the derivative. I named it an example. The symbol is ∫.

∫ 2xdx = x 2+C. We need to add a c to the constant. Understand?