By introducing coordinates (0,0) and (-2,0), a = 1 and b =- 1 are obtained.
So y = (x+ 1) 2- 1 = x 2+2x.
2)
h(x)=f(X)+λf(-x)=x? +2x+
1+λ(x? -2x)=( 1+λ)x? +(2-2λ)x
The new function increments at-1 And 1.
It holds when 1+λ=0 and λ=- 1
(λ- 1)/(λ+ 1)> 1, λ
When 1+λ >; 0,(λ- 1)/(λ+ 1)