Answer:

Step-by-step explanation:
Let the first term be
, then the terms of the sequence are:
.
Since the fourth term is 108, we have


Hence the sequence becomes:
.
The explicit expression for a geometric expression is given by:

where a=4 and r=3
The required formula is:

REWARDING BRAINLY
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18, 42, and 27. they were all times by 2
Answer:18.3
Step-by-step explanation: