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我快被气死了。
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Articles under the label of 等比中项
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等比中项
等比数列
定义等比数列如果一个数列从第二项起,每一项与它的前一项的比等于同一常数,那么这个数列就叫做等比数列。等比中项如果在$a$与$b$中间插入一个数$g$,使数...
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