3. Suku ke-8 dari pola bilangan 3, 7, 14, 24, ... adalah .... A. 83 B. 84 C. 93 D. 94 Jawab:
Un = a + (n-1)b + (n-1)(n-2)c/2
U8 = 3 + (8-1)4 + 1/2*(8-1)(8-2)3
= 3 + 28 + (1/2)*7*6*3
= 31 + 63
= 94
D. 94
[answer.2.content]1900: Or The Last President (Annotated)
1900: Or The Last President (Annotated)
Un = a + (n-1)b + (n-1)(n-2)c/2
U8 = 3 + (8-1)4 + 1/2*(8-1)(8-2)3
= 3 + 28 + (1/2)*7*6*3
= 31 + 63
= 94
D. 94
[answer.2.content]