Σ Izibalo
Imisebenzi okuthi, ngokwahlukana okubaluliwe kwe f(x), yenze isamba
(f(x)) = f(a) + f(a + 1) + f(a + 2) + ⋯ + f(b).
Isifaki se-syntax Yesibonisi Semvelo yilesi (f(x)), kuyilapho isifaki se-syntax Yesibonisi Somugqa kuyilesi ∑(f(x); a; b).
U-a no-b yizinombolo ezingabalulwa phakathi nokwahlukana kuka -1 × 1010 < a ≦ b < 1 × 1010.
Isibonelo: 
(x + 1) = 20
(MthIO-MathO)
(
)
(X)
1
15
- 20
(LineIO)
- ()(X)1(;) 1(;) 5
- 20
Phawula
Okulandelayo ngeke kusetshenziswe ku-f(x): Pol, Rec, ÷R. Okulandelayo ngeke kusetshenziswe kulokhu f(x), a, noma b: ∫, d/dx, Σ.
