Question

am nevoie urgent!! 25 puncte​

Answer 1

Explicație pas cu pas:

E(x) = (x^2(x-2)/(2x^2) - (x-2)(x+2)/4x) * 2/(x-2) + 1/2 =

((x-2)/2 - (x-2)(x+2)/4x) * 2/(x-2) + 1/2 =

(x-2)/2  * (1 - (x+2)/2x) * 2/(x-2) + 1/2 =

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

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

(3x - x - 2)/2x =

(2x - 2)/2x =

2(x-1)/2x =

(x-1)/x =

x/x - 1/x =

1-1/x.