Given the explicit rule: {an} = 3n – 2, find a7.
Hint
Plug and chug.
Answer
a7= 19
Given the explicit rule: {an} = 2n + 1, find a9.
On your calculator, press 2 ^ ____ + 1.
a9= 513
Find the explicit rule for the sequence 3, 5, 7, 9, …
+1 is your friend.
{an} = 2n + 1
Find the explicit rule for the sequence 4, 16, 64, 256, …
Your skills have improved exponentially.
{an} = 4n
Find a20 for the sequence 4, 7, 10, 13, …
Find the explicit rule first.
61
Find a9 for the sequence 1, 2, 6, 24, 120, …
!
362,880
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