Next, perform linear mapping on each subinterval according to formula (2-7), and there is a corresponding relationship shown in (2-8), then each subinterval is transformed to [-1,1] at this time.
Next, press the subs (2-7) for linear mapping on each subinterval, and have the correspondence shown in (2-8), at which point each sub-interval is transformed to the .-1, 1.
Next, a linear mapping is made on each subinterval according to the formula (2-7), and there is a corresponding relationship shown in (2-8). At this time, each subinterval is transformed to [- 1,1].