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skad [1K]
2 years ago
11

Find the sum of the first 12 terms of geometric sequence 3,-9,27-81,243

Mathematics
1 answer:
Over [174]2 years ago
5 0

Answer:

3, -9, 27,-81,243,-729,2187,-6561,19683,-59049,177147,-531441

the sum is −398,580

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‡ Actually, the conjugate of a binomial is formed by changing the sign <em>between</em> terms. The purpose is to allow the product of the binomial and its conjugate to be the difference of squares.

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