Diketahui barisan geometri dengan suku ke-4=12 dan suku ke-7=324. maka rasio barisannya adalah
a. 2
b. 3
c. 4
d. 5
e. 6
(dengan caranya ya)
a. 2
b. 3
c. 4
d. 5
e. 6
(dengan caranya ya)
IcukSugiarto
![\\\boxed{\frac{a.r^{6}}{a.r^{3}}=\frac{324}{12}}\\\boxed{r^{3}=\frac{324}{12}}\\\boxed{r^{3}=27}\\\boxed{r= \sqrt[3]{27} }\\\boxed{r= 3}\\\\\bold{\underline{Jadi\ rasio\ barisannya\ ialah\ }}~:\boxed{\bold{b.~~3}}](https://tex.z-dn.net/?f=%5C%5C%5Cboxed%7B%5Cfrac%7Ba.r%5E%7B6%7D%7D%7Ba.r%5E%7B3%7D%7D%3D%5Cfrac%7B324%7D%7B12%7D%7D%5C%5C%5Cboxed%7Br%5E%7B3%7D%3D%5Cfrac%7B324%7D%7B12%7D%7D%5C%5C%5Cboxed%7Br%5E%7B3%7D%3D27%7D%5C%5C%5Cboxed%7Br%3D+%5Csqrt%5B3%5D%7B27%7D+%7D%5C%5C%5Cboxed%7Br%3D+3%7D%5C%5C%5C%5C%5Cbold%7B%5Cunderline%7BJadi%5C+rasio%5C+barisannya%5C+ialah%5C+%7D%7D%7E%3A%5Cboxed%7B%5Cbold%7Bb.%7E%7E3%7D%7D "\\\boxed{\frac{a.r^{6}}{a.r^{3}}=\frac{324}{12}}\\\boxed{r^{3}=\frac{324}{12}}\\\boxed{r^{3}=27}\\\boxed{r= \sqrt[3]{27} }\\\boxed{r= 3}\\\\\bold{\underline{Jadi\ rasio\ barisannya\ ialah\ }}~:\boxed{\bold{b.~~3}}")
2 votes
Thanks 8