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6-54.

Write the first $5$ terms for each of the sequences.

$a_n = 2n - 5$
Step (a):
$a_1 = 2(1) − 5$
$a_2 = 2(2) − 5$

$a_1 = 3$
$a_{n+1} = -2 · a_n$
Step 1(b):
Note that $a_1$ is given.
Step 2(b):
$a_2 : a_{1+1} = −2 · a_1$
$a_2 = −2(3)$
Step 3(b):
$a_3 : a_{2+1} = −2 · a_2$
$a_3 = −2(−6)$

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