Геометрическая прогрессия:Дано: b1=1/2, q=1/3Найти: 1)b4=? 2)s5=?
b4=1/2*1/27=1/54
S5= - 1/108
b4=1/2*(1/3)**3=1/54
s5=(1/2*((1/3)**5-1))/(1/3-1)=242/729
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b4=1/2*1/27=1/54
S5= - 1/108
b4=1/2*(1/3)**3=1/54
s5=(1/2*((1/3)**5-1))/(1/3-1)=242/729