kak bantu jwab bsk dikumpul buka fotonya
[tex]Un = a \times {r}^{n - 1} [/tex]
U8 = 384
S8 = 765
Penjelasan dengan langkah-langkah:
3, 6, 12, 24
x2 x2 x2
a = U1 = 3
r = 2
[tex]Un = a \times {r}^{n - 1} [/tex]
[tex]Un = 3 \times {2}^{n - 1} [/tex]
[tex]U8 = 3 \times {2}^{8 - 1} = 2 \times {2}^{7} = 3 \times 128 = 384[/tex]
[tex]Sn = \frac{a( {r}^{n} - 1)}{r - 1} [/tex]
[tex]S8 = \frac{3( {2}^{8} - 1)}{2 - 1} = \frac{3(256 - 1)}{1} = 3 \times 255 = 765[/tex]
[answer.2.content]
