Question: For the geometric sequence -2, 6, -18, .., 486 find the specific formula of the terms. Write the sum-2+ 6-18 +.. + 486 using the

For the geometric sequence -2, 6, -18, .., 486 find the specific formula of the terms. Write the sum-2+ 6-18 +.. + 486 using the summation notation and find the sum.

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