Question 0401b

Arithmetic and Geometric Progressions (APs, GPs)
AP II

Question

Find the sum of the following arithmetic series:
−9−12−15−…−57.- 9 - 12 - 15 - \ldots - 57.

Attempt

Sn={S_{n}=}

Answer

Question Progress

  • Start
  • Mastery
about questions progress