Ask Question
29 September, 17:05

Find the sum of the first 70 terms of the sequence - 6, - 3, 0, 3, 6, ...

+3
Answers (1)
  1. 29 September, 20:04
    0
    Hello:

    -3 - (-6) = 0 - (-3) = 3-0=6-3=3 (arhtmitic sequence r = 3)

    Un = U1 + (n-1) r

    U70 = - 6 + (70-1) (3) = 201

    sum = n/2 (U1 + U70)

    sum = 70/2 (-6+201) = 6825
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Find the sum of the first 70 terms of the sequence - 6, - 3, 0, 3, 6, ... ...” in 📘 Mathematics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers