Предмет: Алгебра, автор: Аноним

помогите пожалуйста!!! Виконайте дії….., Побудуйте графік функції:

Приложения:

Ответы

Автор ответа: abildaevaalamina2
1

Ответ:

a) 3y-1/y² + 5-8y/y² = 3y-1+5-8y/y² = -5+4/y²

б) x²+3/x³ - 3-x/3x = 3(x²+3) - x² × (3-x)/3x³ = 3x²+9-3x²+x³/3x³ = 9+x³/3x³

в) 2а³/b × b²/6a³ = b/3

• (a³;a³) – взаимно уничтожаются, как и (b;b²) остаются 2 и 6, их просто минусуем и получается 3

г) 4с+4/5с⁴ ÷ с²-1/10с⁵ = 4(с+1)/5с⁴ × 10с⁵/с²-1 = 4(с+1) × 2с/(с-1)(с+1) = 4 × 2с/с-1 = 8с/с-1

д) а²-81/а²-12а+36 ÷ а²+9а/а-6 = (а-9)(а+9)/(а+6)² × а-6/а²+9а = (а-9)(а+9)/а+6 × 1/а×(а+9) = а-9/а-6 × 1/а = а-9/а×(а-6) = а-9/а²-6а

е) 2аb+b - 4ab/2ab+b = 2a×(2a+b)+b×(2a+b)-4ab/2a+b = 4a²+2ab+2ab+b²-4ab/2a+b = 4a²+0+b²/2a+b = 4a²+b²/2a+b

ж) 3/x+3 - 3/x²-3x + 2x/9-x² = 3/x+3 - 3/-x×(-x+3) + 2x/(x-3)(x+3) = 3/x±3 - 3/x+(-x+3) + 2x/(3-x)(3+x) = 3x+(-x+3)-3+(x+3)+2x²/x+(-x+3)×(x+3) = -3x²+9x-3x-9+2x²/x+(-(x-3))×(x+3) = -x²+6x-9/(-(x-3))×(x+3) = -x²+3x+3x-9/(-(x-3))+(x+3) = -x+(x-3)×(x-3)/(-(x-3))+(x+3) = x-3/x×(x-3) = x-3/x²+3x

Объяснение:

/ = Это типо как дробь

А последнее задание я хз как решать :((

Ещё сорри что долго писал и опоздал с ответом

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