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已知各项均为正数的等比数列{an}中,则此数列的各项和S=________.
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已知各项均为正数的等比数列{a
n}中,
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAJkAAAAZCAYAAAAi7IxiAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAsRJREFU
aEPtmoGRgyAQRbUj+7ELi7AJe7AA62AmPdgEx4J6gOBCBFyNzt3kkiOw/H18YZOai6sidtV1HRQR
wdCD4qbSqJjOABm1SySBWkiPjKeUziSzWWryjyQnYlKldP4dyOaJd1XHpzkiCw9vmgUyh873gIwN
sG9Uv93EnZyINgPzULG9/4VMV2gHWYjORwvPo3MyyDYIVhiQx6NYjcnDytjoYXyAfl00HUEmB4P3
3h+yy3VG3X2vswEZGxa3qAbOgEqvNaAjnWqgQzYzZjjXPHVuNyMKGRVNXQn5Smc0s17IZj51ukMo
x7iIMXlb9F4a/P8JXBeH/igWitFJaSejpSkG2e7/oTrvIPFAJpNlNAaB4m4t2Wzcmj3E6oSfmJOl
0NQHRozWwduSUJ2/cjJ5GrBWPbzm22Cjg5xv4HUyY3+2UwVxXr+TrUk7H/nSA0FNo5zsSGdUJIeT
wR6nM871yubN19CekzZwQwZx2bdAbdgTTpYaMoqahkOG6Ixm2gGZaevL6U2ewmYufvJfY7uUJ9pt
LBdkbEBu3ycgg4FT1owu19SVtVQ6o0S49mTS2rVTpTzqw3NHUjMUNMdxlGH3TcWb/iP/thMOzmDs
w1CgLCWMOe73dCkBkyOHaqrXpTKfsq7UObxOlrugKVeacjM96e4T5MFtE11pVBqIxWzV/zJzpiZ+
gc7hkMkI85YBWuGg4GbJnYUKV3ocsB3RnntPzRliL60zKcg+fcOrpv8NyDR4ZIG5iI2pQUvrTAoy
EABW2U84mdq8qSK476OyDC62dllSZ3KQ2XuyjDrT6Xo5KJQuG5VazCQho5P9cpGUvmWWm5k4yMUN
lnfjHxfLw1pf+IWE3Eq+kOVWOKj/+M+Kg7ol0igcMqSgSWQ+twlD3h63InjclxFuM8kl0HDI7jaz
N14yCryQkUnFcwN5IXtubsnM7A8rDm67nKLlZQAAAABJRU5ErkJggg==
)
则此数列的各项和S=________.
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