diketahui n=8,r=1/2 , dan U8=5 carilah a

Diketahui : n = 8 , U8 = 5 , r = ½

Dicari : nilai a ?

Jawab :

a = U8.n × [n / r]
a = 5.8 × [8 / ½]
a = 40 × [8 × 2]
a = 40 × [16]
a = 640

Semoga membantu :)