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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> | |