Question

Find the sum of whole numbers from 1 to 830

Answer 1

344865

Step-by-step explanation

Use the following formula:

`\sum ^n_(i=1)i=(n(n+1))/(2)`

In this case, n=830, thus you get your answer by entering 830 in the formula like this:

`\begin{gathered} \sum ^n_(i=1)i=(n(n+1))/(2) \\ \sum ^(830)_(i=1)i=(830(830+1))/(2) \\ \sum ^(830)_(i=1)i=(830(831))/(2) \\ \sum ^(830)_(i=1)i=(689730)/(2) \\ \sum ^(830)_(i=1)i=344865 \end{gathered}`

so, the answer is

344865