yg jago matematika nih bntu yaaa
Matematika
ziahziah1
Pertanyaan
yg jago matematika nih bntu yaaa
1 Jawaban
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1. Jawaban Sakti2017
Dik. U1 = a = 16
U6 = 1/2
Dit. U8 .... ?
Penyelesaian :
Un = a.r ⁿ⁻¹
* U6 =16. r ⁶⁻¹
U6 =16. r ⁵
1/2 = 16. r ⁵ (dikali 1/16)
1/32 = r ⁵
1/2⁵ = r ⁵
r = 1/2
* U8 = a.r⁷
= 16.(1/2)⁷
= 16.(1⁷/2⁷)
= 16.(1/128)
= 16/128 (dibagi 16)
= 1/8
Jadi, Suku ke 8 = 1/8 ..................(Jawaban : B)