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Home > INT3 > Chapter 10 > Lesson 10.3.3 > Problem 10-187

10-187.
  1. What is the sum of each series? Homework Help ✎

    1. 11 + 12 + 13 + … + 40

    2. 90 + 84 + 78 + … + 24

Find the sequence that describes the series.

t(n) = 10 + n

Find which term is 40.

(40) = 10 + n
30 = n

Find the sum using the formula

See part (a).