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sum

n: 5;

i: 2^(j-1);

y: i*x^i/(1+x^i);

Calculate

sum

sum(i,i,1,n);

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sum

sum(i,i,0,19999);

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sum

sum(xi,i,1,n);

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sum

u(t):=40000*.9^t+5416...

s(t):=u(t)*3.63/400000;

sum(s(t),t,0,11);

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sum

? (%i3) sum (a(i), i...

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sum

N:2;

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

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sum

a: sum(a[k], k, 1, 10);

b: sum(b[k], k, 1, 10);

sum(a+b, k, 1, 10);

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sum

n: 5;

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

h: 2^n;

Calculate

sum-true

sum(i,i,1,n),simpsum=...

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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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