Re: [Inkscape-user] Mathematical calculation in Inkscape

You hold down the shift key while you mark f1(x), f2(x) and f3(x). Then Path > Union. That's very simple - but perhaps you didn't mean this?

No, I didn't mean this.

Say f1(x)=sqrt(1-x^2), f2(x)=sqrt(1-(x-1)^2), f3(x)=sqrt(1-(x-2)^2), I want to plot f(x)=f1(x)+f2(x)+f3(x)=sqrt(1-x^2)+sqrt(1-(x-1)^2)+sqrt(1-(x-2)^2).

Thanks, Peng