How to solve the derivative problem in senior high school mathematics?
[4/3,2)
Derive h(x) first, and apply the conditions to get X? -2x+ 1 (this step is very simple, please ask if you have any questions). From (2), we can preliminarily know that f(x)=2-x, x ∈ (1, 2], when x ∈ (2,4), x and y = k.