Jawabanmu

Jawaban paling cerdas!
2014-03-26T19:47:38+07:00
A) U8 = 3 + (8-1)b = 24
3 + 7b = 24
7b = 24 - 3
7b = 21
b = 21/7
b = 3
maka bedanya = 3

b) 3 + 6 + 9 + 12 + ......

c) S10 = 1/2.10 (2.3 + (10-1).3)
= 5(6 + 9.3)
= 5(6 + 27)
= 5.31
= 155
jadi jumlah 10 suku pertama = 155
1 5 1