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单选题
The first term in a geometric sequence is 3 and the 4th term is 81. What is the 10th term of the sequence?
A
177, 147
B
59, 049
C
19, 683
D
6, 561
E
2, 187
参考答案
参考解析
解析：
First find the common multiplier needed to get from 3 to 81 in 3 steps. This number is 3. Six more steps get us to the 10th term. Therefore 81 × 36 = 59 049.
First find the common multiplier needed to get from 3 to 81 in 3 steps. This number is 3. Six more steps get us to the 10th term. Therefore 81 × 36 = 59 049.
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