q= 1/6 : 1/3 = 1/6 * 3/1 = 1/2
b5=b4*q=1/6*1/2 = 1/12
<span>3х^2+1/4y^3
x = 1/3
</span>3х^2+1/4y^3 = 3*(1/3)^2+1/4y^3 = 3*1/9+1/4y^3 = (1/3)+(1/1)*3/4y^3 =
= (4/3)/4y^3
1) S=пr^2
C=2пr
R=a/sqrt3
R=5 см
S=25п см^2
С=10п см
<span>Ответ: 25п см^2, 10п см</span>
-2,(7) -0,142536 0,125 0,1(25)
1) (7а - 9в) + (-3в + 2а)= 7а-9в+(-3в) +2а= 7а+2а+(-9в)-3в=9а+(-12в)
2) (-3х2-5х+1)-(-3х2+2х-9)=-3х2-5х+1-3х2-2х+9=-3х2-3х2-5х-2х+1+9= -6х2-3х+10