The formula is true for all real numbers r except r = 1
Chapter 5, Problem 2E(choose chapter or problem)
The formula is true for all real numbers r except r = 1 and for all integers n ? 0. Use this fact to solve each of the following problems:a. If i is an integer and i ? 1, find a formula for the expression 1 + 2 + 22 +…+ 2i-1.________________b. If n is an integer and n? 1, find a formula for the expression 3n-1 + 3n-2 + + 32 + 3 + 1.________________c. If n is an integer and n ? 2, find a formula for the expression 2n + 2n-2•3 + 2n-3•3 + …+ 22•3 + 2•3 + 3________________d. If n is an integer and n > 1, find a formula for the expression 2n –2n-1 + 2n-2 –2n-3 + … + (–1)n-1 •2 + (–1)n.
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