CPM Homework Help : CCA Problem 6-46

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6-46.

For each sequence defined recursively, write the first few terms. Then use the terms to write an explicit equation.

$a_1=17$
$a_{n+1}=a_n−3$

Hint (a):
For help, write out a sequence:
a₁ = 17, a₂ = 14, and so on.
Answer (a):
a_n = 20 − 3n

$a_1=20$
$a_{n+1}=\frac{1}{2}·a_n$

Hint (b):
a₁ = 20, a₂ = 10, and so on.

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