Click on f(x)=(px)^2 to explore variations of the integral above. It would be much more direct to rewrite and integrate as f(x)=p^2(x^2) but that option is not available for many functions. For that reason, I opted to show the process unfold with “p” affecting the function horizontally. This same process is seen in the Riemann Integral of Cos(px)
samuelson mathxp 