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sum

sum(n,n,1,5);

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sum

sum(x-1,x,1,20);

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sum

i:2;

x:4;

sum(x^i,i,2,5);

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sum

sum (n!/((n-(k-l))!*(...

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sum

IntegerDigits( sum ((...

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sum

n: 2;

x: 0.3;

z: sum((2^(j-1))*x^(2...

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sum

N:2;

su: sum(a[2*ii]*(s-1/...

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n:4;

eq1:sum(1/2*(n-i+1)*(...

eq2:sum((n-i+1)*(n-i+...

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sum

f(n) := (-1/2)^n;

sum(f(n), n, 0, 10000);

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sum

sum (n!/((n-(k-l))!*(...

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sum

Run Example
(%i1)kill(all);
(%o0)                                done
(%i1) Flows: [-500, 200, 250, 300, 400];
(%o1)                     [- 500, 200, 250, 300, 400]
(%i2) NPV: sum(Flows[i]/((1+0.20)^(i-1)), i, 1, length(Flows));
(%o2)                          206.7901234567902
(%i3) 
Run Example
define_variable (foo, 0, float);
(%o1)                                  0
(%i2) fpprec : 600;
(%o2)                                 600
(%i3) for m:301 step 1 thru 310 do(foo: bfloat(sum(k^m/3^k,k,1,2100)),foo: foo-floor(foo),disp(m,foo));
                                      301

                                     0.0b0

                                      302

                                     0.0b0

                                      303

                                     0.0b0

                                      304

                                     0.0b0

                                      305

                                     0.0b0

                                      306

                                     0.0b0

                                      307

                                     0.0b0

                                      308

                                     0.0b0

                                      309

                                     0.0b0

                                      310

                                     0.0b0

(%o3)                                done
(%i4) 
Run Example
sum(sin(%pi*k/8),k,1,7)*%pi/8;
               7 %pi        5 %pi        3 %pi        %pi
      %pi (sin(-----) + sin(-----) + sin(-----) + sin(---) + sqrt(2) + 1)
                 8            8            8           8
(%o1) -------------------------------------------------------------------
                                       8
(%i2) 

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