A1=-1,5-1,5=-3;
a6=-1,5-9=-10,5;
S6=(a1+a6)*6/2=(-3-10,5)*6/2=-13,5*3=-40,5;
Ответ: S6=-40,5
Ответ:
4= 1/12 , 5=[ln(2/5)]/5 , 6=1/4
Объяснение:
X³(x - 2) + 2x²(x - 2) - 21x(x - 2) + 18(x - 2) = 0
(x - 2)*(x³ + 2x² - 21x + 18) = 0
(x - 2) *(x²(x - 1) + 3x(x - 1) - 18(x - 1)) = 0
(x - 2)*(x - 1)*(x² + 3x - 18) = 0
(x - 2)*(x - 1)*(x(x - 3) + 6(x - 3)) = 0
(x - 2)*(x - 1)*(x - 3)*(x + 6) = 0
x - 2 = 0
x = 2
x - 1 = 0
x = 1
x - 3 = 0
x = 3
<span>x + 6 = 0
x = - 6</span>
65 см - 156г
х см - 93г
х = 65*93/156 = 38,75 см