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一、从等差数列与等比数列的基本问题、均值不等式的应用的角度命题例1(2012年高考北京卷)已知{a_n}为等比数列.下面结论中正确的是
First, from the arithmetic progression and the geometric sequence of the basic problems, the application of the mean inequality perspective Proposition 1 (2012 college entrance examination Beijing volume) known {a_n} for the geometric sequence. The following conclusions are correct