Question

(X+Y-1) la puterea 2007 . X=1-a , Y=1+a

Answer 1

(1-a+1+a-1)^2007=(2-1)^2007=1^2007=1

Answer 2

[1-a+1+a-1]²⁰⁰⁷=[1+1-1]²⁰⁰⁷=1²⁰⁰⁷=1;