3/5 • x + 2 1/3 - 4 5/6 • x - 2 2/3 • x =
= 18/30 • x + 2 1/3 - 4 25/30 • x - 2 10/30 • x =
(18/30 - 6 15/30)x + 2 1/3 = (18/30 - 145/30 - 80/30)x + 2 1/3 =
= (-207/30)• 1/3 + 2 1/3 = -69/30 + 70/30 = 1/30
Решение:
Дано:
b1=9
b2=3
Найти: b5 ?
bn=b1*q^(n-1)
q=b2/b1=3/9=1/3
b5=9*(1/3)^(5-1)=9*(1/3)^4=9*1/81=1/9
Ответ: b5=1/9
Y=(x-3)ˇ2 - x(x-8)
y=xˇ2-6x+9-xˇ2+8x
y=2x+9