Jawabanmu

2014-02-01T15:40:10+07:00
A = 9
b = \frac{22}{3} - 9 ( \frac{27}{3} ) = - \frac{5}{3}

Un   = a + (n-1) b
U31 = 9 + (31-1) - \frac{5}{3}
       = 9 -  \frac{150}{3}
       =  \frac{27}{3}  \frac{150}{3}
       = - \frac{123}{3}
       = -41
9(27/3) itu bukan perkalian ya ^_^
jelas gak jawabanku ? pasti gak jelas ._.