### Home > CCAA8 > Chapter 5 Unit 6 > Lesson CCA: 5.3.2 > Problem5-106

5-106.

Read the Math Notes box in this lesson for information about an alternative notation for sequences and write the first 5 terms of these sequences.

1.   $a_n=2n-5$

a1 = 2(1) − 5
a2 = 2(2) − 5

1. $a_1=3$
$a_{n+1}=-2·a_n$

Note that a1 is given.

a2 : a1+1 = −2 · a1
a2 = −2(3)

a3 : a2+1 = −2 · a2
a3 = −2(−6)