Texas Instruments TI-73 - Manual (Page 20)

Patterns and Relations Activity 4: Stadium Walls
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© 1998 T EXAS I NSTRUMENTS I NCORPORATED
6. Now have students determine how many beams are
needed for a length of 57.
Discuss how they found their solutions.
(Some students may find the solution by recognizing
that each number in the right-hand column is obtained
by adding 3 to the previous term, starting with 4.)
7. Show students how the TI-73 may be used to find the
solution in the same manner. You can do this in one of
two ways, with the @ key or with the b key.
a. Using the @ key:
(1) Access the Set Constant screen.
- † (above the @ key)
(2) At C1 , enter the constant.
\ [
(3) Return to the Home screen.
- l
(4) At the Home screen, begin your sequence with
4.
4 @ @ @ and so on
➪
n = number of counts
b. Using the b key:
At the Home screen, begin your sequence.
b \ [ b b b and so on
(You might discuss the inefficiency of this method
for large numbers.)