Suppose you want to enter the sequence \(u_n = u_1 \cdot \left(\frac{1}{2}\right)^n\) with \(u_1 = 0.3\) on your calculator.

1. Create a new document, press and select Add Calculator.
2. Press , select Actions > Define.
3. Type u(n), then write the expression of the sequence.

   

Suppose you want to enter the sequence \(u_n = \frac{1}{2} \cdot u_{n-1}\), with \(u_1 = 0.3\) on your calculator.

1. Create a new document, press and select Add Calculator.
2. Press , select Actions > Define.
3. Type u(n), press and select.
4. On the first line, write the initialization. On the second line, write the recursive expression.

   

Suppose you want to display the graph of the sequence \(u_n = u_1 \cdot \left(\frac{1}{2}\right)^n\) with \(u_1 = 0.3\) on your calculator, starting at \(n = 1\) and ending at \(n = 20\).

1. Create a new document, press and select Add Graphs.
2. Press , select Graph Entry/Edit > Sequence > Sequence.
3. In the first line, write the expression of the sequence. In the second line, write the number of initial terms.

   

4. Press and the graph of the sequence is displayed.

   

Suppose you want to know the 320th term of the sequence \(u_n = u_1 \cdot \left(\frac{1}{2}\right)^n\) with \(u_1 = 0.3\).

1. Enter the sequence on your calculator (see instructions above).
2. Press and write u(320) in the following line.

   

Suppose you want to graph the series of the sequence \(u_n = u_1 \cdot \left(\frac{1}{2}\right)^n\) with \(u_1 = 0.3\) on your calculator, starting at \(n = 1\) and ending at \(n = 20\).

1. Enter the sequence on your calculator (see instructions above).
2. Enter the series of the sequence in the line below. To do this, define s(n) =.

   

3. Create a new document, press and select Add Graphs.

   

4. Press , select Graph Entry/Edit > Sequence > Sequence.
5. In the first line, write s(n). In the second line, write the number of initial terms.
6. Press and the graph of the series is displayed.

   

1. Enter the sequence on your calculator (see instructions above).
2. Enter the series of the sequence in the line below.
3. Type s(20) to set the ending of the series at \(n = 20\). Press . The result should be \(0.3\).