Recent content by trains99

  1. T

    What is the Closed Form of the Power Series 1+3x+6x^2+10x^3+15x^4+21x^5+...?

    Great, got it thanks:)
  2. T

    What is the Closed Form of the Power Series 1+3x+6x^2+10x^3+15x^4+21x^5+...?

    Homework Statement Find the closed form of the following power series 1+3x+6x^2+10x^3+15x^4+21x^5+... Homework Equations 1+x+x^2+.. = 1/(1-x) The Attempt at a Solution I tried differentiating but couldn't get it to any expression that I know the sum for.. I was playing around...