Thursday
March 30, 2017

Post a New Question

Posted by on .

Find n for the arithmetic series with Sn = 360, a1=42 and an= -26

  • Arithmetic Series - ,

    Sn = n/2 (a1 + an)
    360 = n/2(42 - 26)
    360 = 8n
    n = 45

  • Arithmetic Series - ,

    May I ask how did you get that 8n...I'm having trouble working it out on paper for another problem

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question