3х+2у=66
2х+ у=43
(-4х)-2х=-86
-х=-20
х=20 руб
2у=66-3*20
2у=66-60
2у=6
у=3 руб
x³+y³=1
x+y=1
x=1-y
(1-y)³+y³=1
1-3y+3y²-y³+y³=1
3y²-3y=0
3y(y-1)=0
y=0 ∨ y=1
x=1-0 ∨ x=1-1
x=1 ∨ x=0
<span>(1,0),(0,1)</span>
Значение функции в точке x = 2
f(2) = 2 - 1/2 = 3/2 = 1,5
8(а<span>^3+b<span>^3</span></span>)/(a-b)(a+b)=8(a+b)(a<span>^2-ab+b<span>^2</span></span>)/(a-b)(a+b)=8(a^2-ab+b^2)/(a-b)