formula
Original: f (x) = a * x n
Derivative: f' (x) = a * n * x (n- 1)
When f'(x)=0, it is an extreme value.
(There are still some formulas to be used before writing. )
The answer to this question (standard): let y=f(x), then f' (x) = 2 * a * x+b.
When f'(x)=0, there is an extreme value. (find x 1, x2. Then list it and draw it. Explain that x 1, x2 is the maximum and which is the minimum).
"*" is a multiplication symbol. Don't mispronounce it. I don't know how to type it out and publish it. It's easy to mispronounce it.
Ask again if you don't understand.
But I don't have to go. Hmm. How interesting