Y'=6x^2-18x
x (6x-18)=0
x=0 6x-18=0
x=3
x max=0 x min=3
12x^2-2x+42x-7=0
12x^2+40x-7=0
D=1936
x1=-40-44/24=-3.5
x2=-40+44/24=4/25=1/6
otvet: -3.5 1/6
<span>1,8(4-2а)+0,4а-6,2=7,2-3,6а+0,4а-6,2=1-3,2а</span>
<span>если а=<span>5/32 то 1-1/2=1/2</span></span>
<span>0,04x=2
x=50
</span><span>0,6x=4,2
x=7
</span><span>0,34x=10,54
x=31
</span><span>0,35x=2597
x=7420</span>