Question

7.
ITEM 17

Match each sequence with the correct function.

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a
n
​
=−5(−2)
n−1

5, 10, 15, 20, ...
a
n
​
=5−2(n−1)
-5, 10, -20, 40, ...
a
n
​
=−5(3)
n−1

5, 3, 1, -1, ...
a
n
​
=5+5(n−1)
-5, -15, -45, -135, ...

Answer 1

The correct sequence-function matches are:

1. 5, 10, 15, 20, ... corresponds to a_n = 5 + 5(n-1)
2. -5, 10, -20, 40, ... corresponds to a_n = 5 - 2(n-1)
3. 5, 3, 1, -1, ... corresponds to a_n = -5(3)^n-1
4. -5, -15, -45, -135, ... corresponds to a_n = -5(3)^n-1