Question

Срочно
Решите систему уравнений
__________
1) x^3+y^3=9
log2 x + log y = 1
2) 3^y + x = 10
y - log3 x = 2

Answer 1

1) x^3+y^3=9
log2 x + log2 y = 1
 x^3+y^3=9
x*y=2
(2/y)³+y³=9
x=2/y
8/y³+y³=9
y∧6-9y³+8=0
y³=a
a²-9a+8=0
D=81-32=49=7²
a=(9-7)/2=1  a=(9+7)/2=8
y=1 y=2
x=2 x=1   (1 :2) (2:1)
2) 3^y + x = 10
y - log3 x = 2