![]() ![]() Where a is the first term in the sequence, r is the common ratio between the terms, and n is the number of terms in the sequence. Gain fluency and confidence in math IXL helps students master essential skills at their own pace through fun and interactive questions, built in support, and motivating awards. ![]() To find the sum of a finite geometric sequence, use the following formula: For example, 1 + 3 + 9 + 27 + 81 = 121 is the sum of the first 5 terms of the geometric sequence. The -Somos sequences for, 5, 6, and 7 are. The 2- and 3-Somos sequences consist entirely of 1s. (1) where is the floor function and for. The Somos sequence of order, or Somos- sequence, is defined by.
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