answer 2639
Explanation:
We are asked to find the sum of all the integers between 19 and 77.
We will use sum of arithmetic sequence formula to solve our given problem.
, where,
= Sum of n terms,
n = Number of terms in the sequence,
a = 1st term,
d = Common difference.
Since we are asked to take the sum of all the integers between 19 and 77, so common difference is 1.
Therefore, the sum of all integers between 19 and 77 is 2639.
Explanation: