Jawabanmu

2014-02-23T21:35:33+07:00
2014-02-23T21:40:09+07:00
Maaf kalo salah. coba nnti di cek lgi ya U2 = 3 U5 = 1/9 U5/U2 = ar^4 / ar = r^3 dimasukin u5 sma u2 nya jdi 1/9 / 3 = 1/27 = r^3 jadi r = 1/3 <<< rasionya 1/3 U1 = a U2 = ar = 3 a . 1/3 = 3 a = 9 <<< suku pertama