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x:[1,2,3,4,5];

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Run Example
(%i1)sum((-1^n)/(2^n), n, 0, inf), simpsum;
(%o1)                                 - 2
(%i2) 
Run Example
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) 

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