Summation


Press MENU 9 to access the CAS menu, press 2 to access the CALC menu, then press 4 to select 4:S. One can then evaluate summations. Apply the syntax

(summand, index of summation, lower index of summation, upper index of summation).

For example, to evaluate , after S( is pasted in the entry line, enter

X X2 , X , 1 , 1 0 ) EXE

One may also use the alpha key to enter the index as i or k as used more often in summation notation. For example, to compute the sum of k2 as k goes from 1 to 10, first select 4: from the CALC menu. Then, after ( is pasted in the entry line, enter

ALPHA K ^ 2 , ALPHA K , 1 , 1 0 ) EXE

To evaluate , after ( is pasted in the entry line, enter

ALPHA K ^ 2 , ALPHA K , 1 , ALPHA N ) EXE

The Casio can evaluate some basic infinite series, such as a geometric series; for example, . After ( is pasted in the entry line, enter

. 3 ^ X , X , 1 , OPTN F1 ) EXE