1.

The explicit formula for the geometric sequence 3, 15, 75, 375, is _______

A. 2*6! * 3<sup>n-1</sup>
B. 3 * 5<sup>n-1</sup>
C. 3! * 8<sup>n-1</sup>
D. 7 * 4<sup>n-1</sup>
Answer» C. 3! * 8<sup>n-1</sup>


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