Solved: Use the formula for the sum of the first n integers and/or the formula for the
Chapter 5, Problem 29(choose chapter or problem)
Use the formula for the sum of the first n integers and/or the formula for the sum of a geometric sequence to evaluate the sums in 20–29 or to write them in closed form.
\(1 − 2 + 2^{2} − 2^{3} +· · ·+(−1)^{n}2^{n}\), where n is a positive integer.
Text Transcription:
1 − 2 + 2^2 − 2^3 +· · ·+(−1)^n2^n
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