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The geometric mean of two nonnegative numbers a, b is ab; of n. numbers is (a1a2 . . . an)1/n. The geometric mean of a set of positive numbers is less than or equal to the arithmetic mean. + n(n − 1)(n − 2) 3! n n. an − 3b3 + ⋅ ⋅ ⋅ + bn = an − j bj. j j = 0 Example Find the sum of 1 + a + d + ⋅ … ................
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