Question

Find the sum of the sequence 37+38+39+40+...130

Answer 1

The sum is of37+38+39+40+...130 is 154.13

Answer 2

First, you have to calculate the number in the sequence

an = a+(n-1)d

130 = 27+(n-1)1

130-27 = n-1

103+1 = n

n = 104

Now, calculating for sum (Sn)

Sn = n/2 (a+an) = 104/2 (37+130) = 52 (167) = 8684