For Exercises 2527, study the triangular numbers shown below. Step 1 Step 2 Step 3

Chapter 11, Problem 25

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For Exercises 2527, study the triangular numbers shown below. Step 1 Step 2 Step 3 &IGURE }i }i }i{ }ix HOMEWORK For Exercises 1017 1821 2227 See Examples 1 3 2 HELP Example 2 (p. 659) Example 3 (p. 660) BANKING For Exercises 5 and 6, use the following information. Rita has deposited $1000 in a bank account. At the end of each year, the bank posts 3% interest to her account, but then takes out a $10 annual fee. 5. Let b 0 be the amount Rita deposited. Write a recursive equation for the balance b n in her account at the end of n years. 6. Find the balance in the account after four years. Find the first three iterates of each function for the given initial value. 7. f(x) = 3x - 4, x 0 = 3 8. f(x) = -2x + 5, x 0 = 2 9. f(x) = x 2 + 2, x 0 = -1 25. Write a sequence of the first five triangular numbers