Talk:Cost as a Function of Land Pressure and Investment Count/@comment-87.97.242.218-20150926012226/@comment-87.97.242.218-20150926012724

and this gives the almost identical http://integrals.wolfram.com/index.jsp?expr=c*%28d%5E%28x-1%29%29*%281+%2B+k*x%5E2%29&random=false