Summen ∑ i=n k a i = a n +⋯+ a k MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaabCaeaaca WGHbWaaSbaaSqaaabaaaaaaaaapeGaamyAaaWdaeqaaaqaaiaadMga cqGH9aqpcaWGUbaabaGaam4AaaqdcqGHris5aOGaeyypa0Jaamyyam aaBaaaleaapeGaamOBaaWdaeqaaOGaey4kaSYdbiabl+UimjabgUca RiaadggapaWaaSbaaSqaa8qacaWGRbaapaqabaaaaa@4764@ werden häufig benötigt um Zahlenreihen zu addieren.