y'=6x +2
6x+2 = 0
x = -1/3
1) x = -2
y = 3*4 +2*(-2) -1 = 12 -4 -1 = 7
2)x = 1
y = 3*1 +2*1 -1 = 3 +2 -1 = 4
3) x = -1/3
y = 3* 1/9 +2* (-1/3) -1 = 1/3 -2/3 -1 = -1 1/3
ответ: max у = 7
y'=6x +2
6x+2 = 0
x = -1/3
1) x = -2
y = 3*4 +2*(-2) -1 = 12 -4 -1 = 7
2)x = 1
y = 3*1 +2*1 -1 = 3 +2 -1 = 4
3) x = -1/3
y = 3* 1/9 +2* (-1/3) -1 = 1/3 -2/3 -1 = -1 1/3
ответ: max у = 7