### Related

sum(k,k,1,16);

Calculate

##### sum

f(n) := (-1)^(n+1) *(...

sum(f(n), n, 1,8);

Calculate

##### sum

sum (i/4, i, 153, 156);

Calculate

##### sum-true

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

sum(a*i-n,i,1,n), sim...

Calculate

i:2;

x:4;

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

Calculate

##### sum

sum(100000-i,i,0,1000...

Calculate

##### sum

n:4;

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

eq2:1/2*(1/2*(n+1)*(n...

Calculate

##### sum

sum(x[i]*(i-(n+1)/2),...

simplify(%o1);

Calculate

##### sum

f(k):=7*k+9:sum(f(k),...

Calculate

##### sum-true

sum(i,i,1,1000),simps...

sum(a*i-n,i,1,n)/n, s...

Calculate

### sum

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));
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(%o3)                                done
(%i4) ```

Help for Sum