4х х _ 3 4х - х + 3 3х + 3
а) ------ - ------------ = --------------- = -----------
х +1 х + 1 х + 1 х + 1
2 - х х - 3 2 - х + х - 3 1
б) ------------ + ---------- = ----------------- = - -----------
4 - у² 4 - у² 4 - у ² 4 - у²
2х² 2х(1 - х) + 2х² 2х - 2х² + 2х² 2х
в) 2х + --------- = ---------------------- = ------------------------ = --------------
1 - х 1 - х 1 - х 1 - х
a - b a - b (a - b)b + (a - b)a ab - b²+ a² - ab b² + a²
г) --------- + ---------- = ------------------------- = ------------------------ = - ----------------
a² ab a³ b a³b a³b
3 x 3x 3x(x - 3) + 3x(x + 3) 3x² - 9x + 3x² + 9x 6x²
д) ------- + ------------ = ----------------------------- = --------------------------- = ----------
x + 3 x - 3 x² - 9 x² - 9 x² - 9
2a 1 2a - a - 3 a - 3 1
е) --------- - ---------- = ---------------------- = -------------------- = --------------
a² - 9 a - 3 (a - 3) (a + 3) (a - 3) (a + 3) a + 3
16 4 16у-4(4у+у²) 16у-16у-4у² 4у² 4
ж) ------- - ------ = ------------------- = ------------------ = - ---------- = - --------
4у+у² у (4у+у²)у 4у² + у³ у²(4+у) 4+у