Use `GeoGebra`

to calculate sums, including infinite series. These are a lot of work to compute by hand, but GeoGebra makes it easy.

`GeoGebra`

Instruction 1

- 1.
- Open
`CAS`

under`View`

in`Menu`

. - 2.
- Use the command
Sum(<Expression>, <Variable>, <Start Value>, <End Value>).

Type the expression for ${a}_{n}$ in

`<Expression>`

. Type $n$ for`<Variable>`

. Insert the start value of $n$ in`<Start Value>`

, and the end value of $n$ in`<End Value>`

.If you want to compute an infinite series, type

`inf`

in`<End Value>`

(`inf`

is short for infinity).