### Home > CCA > Chapter 6 > Lesson 6.1.4 > Problem6-46

6-46.

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

1.  $a_1=17$
$a_{n+1}=a_n−3$

• For help, write out a sequence:
a1 = 17, a2 = 14, and so on.

• an = 20 − 3n

1.  $a_1=20$
$a_{n+1}=\frac{1}{2}·a_n$

• a1 = 20, a2 = 10, and so on.