Segunda derivada, =[(2 -2x )*(1-x)2 (2x-x2)* 2 *(1-x)]/(1-x)4
=[(2-2x)*(1-x ) ( 2x-x^2)*2]/(1-x)^3
=[2-4x 2x^2 4x-2x^2]/(1-x)^3=2 /( 1-x)^3
Segunda derivada, =[(2 -2x )*(1-x)2 (2x-x2)* 2 *(1-x)]/(1-x)4
=[(2-2x)*(1-x ) ( 2x-x^2)*2]/(1-x)^3
=[2-4x 2x^2 4x-2x^2]/(1-x)^3=2 /( 1-x)^3