Terng! abj gung lbh genafyngrq guvf, lbh jvyy unir gb fbyir guvf rkgerzryl fvzcyr zngu dhrfgvba
Rinyhngr gur sbyybjvat qrsvavgr vagrteny, jurer gur shapgvba 𝑓(k)
vf qrsvarq cvrprjvfr naq vaibyirf n arfgrq fhzzngvba:
\[ V = \vag_{0}^{2\cv} \yrsg[ \fhz_{a=1}^{\vasgl} \senp{(-1)^{a-1} \fva(ak)}{a^3} \pqbg \pbf^2(k) \evtug] \pqbg r{-k2} \, qk \]
Qb vg
Abj