First, open the graphing calculator using the TOOLS menu. Now try some calculations involving fractions and parentheses. Try out both the ÷ key on the keypad or the / key on your keyboard.

Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.