Find the sum of the following aritmetic formula.

Question

∑(2n-1) from n=1 to 3 find the sum

Answer 1

n = 1, 2, and 3.

2(1) - 1 = 2 - 1 = 1

2(2) - 1 = 4 -1 = 3

2(3) - 1 = 6 - 1 = 5

1 + 3 + 5 = 9

Answer 2