Suku ke-5 dari barisan geometri adalah 243 hasil bagi suku ke-9 dengan ke-6 adalah 27. Suku ke-2 adalah....
izharulhaq78
![\frac{U_9}{U_6}=\frac{ar^8}{ar^5}\\27=r^3\\\sqrt[3]{27}=r\\3=r\\\\U_r=ar^4\\243=a\times3^4\\\frac{243}{81}=a\\3=a\\\\U_2=ar\\U_2=3\times3\\\boxed{U_2=9}](https://tex.z-dn.net/?f=%5Cfrac%7BU_9%7D%7BU_6%7D%3D%5Cfrac%7Bar%5E8%7D%7Bar%5E5%7D%5C%5C27%3Dr%5E3%5C%5C%5Csqrt%5B3%5D%7B27%7D%3Dr%5C%5C3%3Dr%5C%5C%5C%5CU_r%3Dar%5E4%5C%5C243%3Da%5Ctimes3%5E4%5C%5C%5Cfrac%7B243%7D%7B81%7D%3Da%5C%5C3%3Da%5C%5C%5C%5CU_2%3Dar%5C%5CU_2%3D3%5Ctimes3%5C%5C%5Cboxed%7BU_2%3D9%7D "\frac{U_9}{U_6}=\frac{ar^8}{ar^5}\\27=r^3\\\sqrt[3]{27}=r\\3=r\\\\U_r=ar^4\\243=a\times3^4\\\frac{243}{81}=a\\3=a\\\\U_2=ar\\U_2=3\times3\\\boxed{U_2=9}")
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