Свойство
an = (an+1 + an-1)/2 = (3 - 5)/2 = - 2/2 = - 1
1целая 8/9=17/9
2целых 4/9=22/9
х=18,19,20,21.
<span><span>а) (-2/3)*(-5/14)*(-3/4)*(7/10) = (-5/14)*(7/10)*(-2/3)*(-3/4) = (-1/4)*(1/2) = -1/8</span></span>
<span><span /><span>б) (2 1/3)*(-8 2/7)*3*(-7) = (7/3)*3*(- 58/7)*(-7) = 7 * 58 = 406</span></span>
<span><span />в) (-0.2)*(-0.5)*2/3*(-3/2)</span> = (-1/5)*(-1/2)*(-1) = -1/10 = -0.1
2 мин > 110 секунд
4 мин 20 секунд<261сек
8\% = <span> 0,08</span>
18т=18000кг