4 года назад

(56^n+1) / (2^3n+2 * 7^n+1)

1 ответ:

uli4ka7774 года назад

0 0

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Тема:Уравнения и неравенства с двумя переменными Решение систем уравнений второй степени 1) Решите систему уравнений { y(y+4)

сергей-77 [14]

Сначала выведем у в первом уравнении У²+4у=0 D1=2²-1*0=4 Y1=-2+2=-4 Y2=-2-2=0 2*-4-x=-3 X1=-5 2*0-x=-3 X2=3

0 0

3 года назад

Срочно 100 балов!!! ________________________________

svetkalinina [3K]

1. 2³-y³=(2-y)(4+2y+y²) (3m)³+1³ =(3m+1)(9m²-3m+1)
(4y)²-(y^4)²=(4y-y^4)(4y+y^4)

2. ... =(2y-x+2x-y)((2y-x)²-(2y-x)(2x-y)+(2x-y)²) =
= (x+y)(4y²-4xy+x²-4xy+2x²+2y²-xy+4x²-4xy+y²)=
= (x+y)(7y²-13xy+7x²)=7xy²+7y³-13x²y-13xy²+7x³+7yx²=
= 7x³-6xy²-6x²y+7y³

3. 4x²+2x=2x(2x+1) b+4ab+4a²b= b(1+4a+4a²)=b(1+2a)²

... = 2(x²-y²) -(x-y)=2(x-y)(x+y)-(x-y)=(x-y)(2x+2y-1)

4. 114³+166³=(114+166)*Ф(x)=280*Ф(x), где Ф(х) - трехчлен в разложении суммы кубов, все выражение делится на 280.

0 0

4 года назад

Прочитать ещё 2 ответа

-4=0Решитее пжлст

fienf [50]

1/4 x^2 - 4 =0 1/4 (x^2) = 4 x^2=16 x1=4 x2= -4

0 0

3 года назад

С помощью графиков выясните,сколько решений имеет система уравнений: {3x-y=4 2y-6x=-8

sofiy2012

1)Необходимо (у) вывести в правую часть.Четверку в левую.Получится: у=3х-4(я перевернул уравнение).

2)Делим все уравнеие на 2 получаем: у-3х=-4.Перемещаем 3х в праую часть:у=3х-4.