Question

Va rog, ajutati-ma :3
15. Fie expresia E(x)=
Macar punctul a) si b) ​

Answer 1

a) x!=0

x+1!=0 => x!=-1

2x-4!=0=> 2x!=4 => x!=2

=> x€ R\{-1,0,2}

b)

$( \frac{(x + 1) \times (x + 1)}{x(x + 1)} - \frac{x(x - 1)}{x(x + 1)} + \frac{1 - x}{ {x}^{2} + x } ) \times \frac{ {x}^{2} + x3 }{2x - 4}$

$\frac{ {x}^{2} + 2x + 1 - {x}^{2}+x + 1 - x}{x(x + 1)} \times \frac{ {x}^{2} + 3x }{2x - 4}$

$\frac{2x + 2}{x(x + 1)} \times \frac{x(x + 3)}{2(x - 2)}$

$\frac{x + 3}{x - 2}$

c)

x-2/x+3

x-2/x-2

din cele 2 relatii de mai sus => x-2/x+3-x+2

x-2/5 => x-2€ D5

x-2€{-5,-1,1,5}

x€{-3,1,3,7}