« previous next »
Pages: [1]

Author Topic: Quiz4-5B  (Read 3343 times)

Qiaoyi Zhang

  • Newbie
  • *
  • Posts: 3
  • Karma: 0
    • View Profile
Quiz4-5B
« on: October 24, 2020, 11:45:04 PM »
Find a closed form for $\sum_{n=2}^{\infty}  n(n-1)z^n$
Logged
Pages: [1]
« previous next »