V ( 3 - X ) * V ( 1 - 3X ) = X + 5 ; V ( 3 - X )*( 1 - 3X ) = X + 5 ; ( 3 - X )*( 1 - 3X ) = ( X + 5 )^2 ; 3 - 9X - X + 3X^2 = X^2 + 10X + 25 ; 3X^2 - X^2 - 10X - 10X + 3 - 25 = 0 ; 2X^2 - 20X - 22 = 0 ; 2 * ( X^2 - 10X - 11 ) = 0 ; D = 100 + 44 = 144 ; V D = 12 ; X1 = ( 10 + 12 ) : 2 = 11 ; X2 = ( 10 - 12 ) : 2 = - 1 ; ОТВЕТ 11 и ( - 1 )
3X - 5Y = 8 ( * ( -2))
- 6X + 10Y = - 16
6X + 3Y = 3
..............................
13Y = - 13
Y = - 1
3X + 5 = 8
3X = 3
X = 1
ответ X = 1 Y = ( - 1 )
Ответ:
Производная : 12х^3+12х^2=0
(-2) = -48-32+1=-79
(1)=3+4+1=8
->
Максимум 8
Минимум -79