Barisan geometri
[tex] \frac{u4}{u1} = \frac{ - 8}{64} \\ \\ {r}^{3} = - \frac{1}{8} \\ r = - \frac{1}{2} \\ \\ Suku \: ke \: 8 \\ u4 \times {r}^{4} \\ - 8 \times ( - { \frac{1}{2} )}^{ 4} \\ - 8 \times \frac{1}{16} \\ - \frac{1}{2} [/tex]
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Barisan geometri
[tex] \frac{u4}{u1} = \frac{ - 8}{64} \\ \\ {r}^{3} = - \frac{1}{8} \\ r = - \frac{1}{2} \\ \\ Suku \: ke \: 8 \\ u4 \times {r}^{4} \\ - 8 \times ( - { \frac{1}{2} )}^{ 4} \\ - 8 \times \frac{1}{16} \\ - \frac{1}{2} [/tex]