Difference between revisions of "Sum Command"

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(added CAS syntax)
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Following syntax works only in CAS view
 
Following syntax works only in CAS view
 
;Sum[<Expression f(t)>,<Variable t>,<Start Value s>,<End Value e>]
 
;Sum[<Expression f(t)>,<Variable t>,<Start Value s>,<End Value e>]
:Computes sum <math>\sum_{t=s}^{e}f(t)</math>. End value might be inifinity.
+
:Computes sum <math>\sum_{t=s}^{e}f(t)</math>. End value might be infinity.

Revision as of 13:59, 27 July 2011


Sum[List]
Calculates the sum of all list elements.
Note: This command works for numbers, points, vectors, text, and functions.
Example:  
  • Sum[{1, 2, 3}] gives you the number a = 6.
  • Sum[{x^2, x^3}] gives you f(x) = x2 + x3.
  • Sum[Sequence[i,i,1,100]] gives you the number a = 5050.
  • Sum[{(1, 2), (2, 3)}] gives you the point A = (3, 5).
  • Sum[{(1, 2), 3}] gives you the point B = (4, 2).
  • Sum[{"a","b","c"}] gives you the text "abc".


Sum[List, Number n of Elements]
Calculates the sum of the first n list elements.
Note: This command works for numbers, points, vectors, text, and functions.
Example: Sum[{1, 2, 3, 4, 5, 6}, 4] gives you the number a = 10.

CAS specific syntax

Following syntax works only in CAS view

Sum[<Expression f(t)>,<Variable t>,<Start Value s>,<End Value e>]
Computes sum \sum_{t=s}^{e}f(t). End value might be infinity.
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