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NOTE: The variable n is obtained by pressing the X,T,θ,n button.
For u(nMin), type the value of the function at n = nMin. Typically, the value of n will be
1 since we require the sequence be defined for positive integers (1,2,3,...).
Now set the viewing window by pressing WINDOW. Fill in the screen as follows:
Now press GRAPH:
w
You can TRACE along the graph to see the terms in the sequence.
The Factorial Symbol
Suppose we wish to evaluate 8!. This is done by typing 8 on the HOME screen as
follows:
We now wish to enter the factorial symbol. The factorial symbol is located in the MATH
menu. Press MATH, then use the arrows to highlight PRB. You should see the
following on your screen:
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