2*2/3-3=4/3*-3/3=1/3
Ответ 1/3
(x - 3)^3 * (x - 2) * (8 - 2x) = 0
(x - 3)^3 = 0
x - 3 = 0
x = 3
x - 2 = 0
x = 2
8 - 2x = 0
- 2x = - 8
x = 4
<u>Ответ:</u>
2 ; 3; 4
10
a1/a5=9⇒a1=9a5⇒a1=9(a1+4d)⇒a1=9a1+36d⇒-8a1=36d⇒a1=-4,5d
a2*a5=28⇒(a1+d)(a1+4d)=28
(-4,5d+d)(-4,5d+4d)=28
-3,5d*(-0,5d)=28
d²=28/1,75=16
d1=-4⇒(a1)1=18⇒an=18-4(n-1)=18-4n+4=22-4n
d2=4⇒(a1)2=-18⇒an=-18+4(n-1)=-18+4n-4=-22+4n
11
1)|22-4n|<10
-10<22-4n<10
-32<-4n<-12
3<n<8
4 члена
2)|-22+4n|<10
-10<-22+4n<10
12<4n<32
3<n<8
<span>4 члена
</span>12
1)S4=(36-12)*3/2=36
2)S3=(-36+12)*3/2=-36