Hi I have many problems trying to find the general formula and the demonstration by induction.(adsbygoogle = window.adsbygoogle || []).push({});

Let

[tex] A_1 = 3[/tex]

[tex] A_2 = 7[/tex]

[tex] A_3 = 13[/tex]

A_n+3 = 3A_n+2 - 3A_n+1 + A_n

I could only find this.

A_n+1 = A_n + 2n

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Find the general formula

**Physics Forums | Science Articles, Homework Help, Discussion**