a, 3a,...
The first term in the sequence above is a, and each term after the first is 3 times the preceding term. If the sum of the first 5 terms is 605, what is the value of a? I got 25 but the correct answer is 5. Why? THanks in advance
a, 3a,...
The first term in the sequence above is a, and each term after the first is 3 times the preceding term. If the sum of the first 5 terms is 605, what is the value of a? I got 25 but the correct answer is 5. Why? THanks in advance