1. Determine the sum of the first 25 terms of the sequence 1, 2, 4, 8. 16. *

a. 33, 554, 430
b. 33, 554, 431
c. 33,554, 432
d. 33, 554,433


2. What is the sum of the first 18 terms of the geometric sequence 2, 6, 18, 54?*

a. 387, 420, 480
b. 387, 420, 482
c. 387, 420, 486
d. 387, 420, 488
e. none of these​

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