CPM Homework Help : CCG Problem 8-86

What is the $150^{\text{th}}$ term in this sequence?

$17$ , $16\frac{1}{2}$ , $16$ , $15\frac{1}{2}$ , $\dots$

Hint:

Is this a geometric or arithmetic sequence?

More Help:

For more help refer to the Math Notes box in Lesson 4.1.3.

The equation for a geometric sequence is: $a_1 \cdot b^{n − 1}$

The equation for the arithmetic sequence is: $a_n = m(n − 1) + a_1$