Допустимые значения переменной: a ≠ 0, -6.
3x - 6y / x^2 - 4y^2 = (30 - 61) / (0^2 - 4*1^2) = -6 / (-4) = 3/2
(1 + a / a + 1) : 2a + 1 / a^2 + a = (1 + a)/(a + 1) : 2a + 1 / a(a + 1) = (1 + a)/(a + 1) 1 / (2a + 1) / (a(a + 1))= (1 + a) / (a + 1) (a)(a + 1) / (2a + 1) = a(a + 1) / (2a + 1)
Допустимые значения переменной: a ≠ 0, -6.
3x - 6y / x^2 - 4y^2 = (30 - 61) / (0^2 - 4*1^2) = -6 / (-4) = 3/2
(1 + a / a + 1) : 2a + 1 / a^2 + a = (1 + a)/(a + 1) : 2a + 1 / a(a + 1) = (1 + a)/(a + 1) 1 / (2a + 1) / (a(a + 1))
= (1 + a) / (a + 1) (a)(a + 1) / (2a + 1) = a(a + 1) / (2a + 1)