Question

Porve that questio i​

Answer 1

Answer:

Step-by-step explanation:

(1 - x^4) / (1 - x) + (1 - x^3) / (1 + x) =

1 + x^3 + x^2 + x + (1 - x^3) / (1 + x) =

((1 + x^3 + x^2 + x)(1 + x) + (1 - x^3) ) / (1 + x) =

(2 + 2x + 2 x^2 + x^3 + x^4) / (1 + x) =

(2(1 + x + x^2) + x^3 (1 + x))/ (1 + x) =

(1 + x + x^2) / (1 + x) + x^3