CPM Homework Help : CCG Problem 8-21

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Home > CCG > Chapter 8 > Lesson 8.1.2 > Problem 8-21

8-21.

Write an equation for each of the following sequences.

$-30$ , $-15$ , $0$ , $\dots$
Hint (a):
Is the sequence arithmetic or geometric?
More Help (a):
Refer to the Math Notes box in 4.1.3 on sequences.
Answer (a):
$a_n=15\left(n-1\right)-30$

$9$ , $3$ , $1$ , $\dots$
Hint (b):
Is this an arithmetic or geometric sequence?
See part (a) for help.

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