Algebra-1

Question Analysis
This question tests the student's ability to use the explicit formula for a geometric sequence. The problem provides the first term and the common ratio, and asks for the 4th term.

Key Concept Explanation
The explicit formula for the -th term of a geometric sequence is (), where is the first term and is the common ratio.

Step-by-step Solution
1. Identify the given values: , , and .
2. Substitute these values into the explicit formula:

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