User Portlet
| Discussions |
|---|
| Hi, I used Wolfram|Alpha Pro Premium for Educators. Please why this work: plot Integrate[\(40)Sum[Sin[mπx]Sin[πy],{m,1,3}]\(41)*\(40)Sum[sin\(40)kpix\(41)sin\(40)kpiy\(41),{k,1,3}]\(41),{y,0,1}],x=0:1 but this not? (give me the... |