CPM Homework Banner

Home > A2C > Chapter 3 > Lesson 3.2.3 > Problem 3-125

3-125.
  1. Decide whether each sequence below is arithmetic, geometric, or neither. Then find equations to represent each sequence, if possible. Homework Help ✎

    1. 10.3, 11.5, 12.7, …

    2. , , , …

    3. 1, 4, 9, …

    4. 1.1, 1.21, 1.331, …

Notice that the increase is not a constant number.

The sequence is arithmetic.
t(n) = 9.1 + 1.2n

Notice the ratio.

Notice that each number is a perfect square.

Notice that the sequence's increase is constant.

Remember what 11 squared is.

The sequence is geometric.
t(n) = 1.1n