Question

Find the sum of the first 9 terms of the following sequence. Round to the nearest hundredth if necessary.

75, 72. ,69.12

Answer 1

Explanation:

The sequence you've provided is an arithmetic sequence, where each term decreases by a constant difference. The common difference (d) can be found by subtracting the second term from the first term, or the third term from the second term.

So, d = 72 - 75 = -3 or d = 69.12 - 72 = -2.88.

However, these two differences are not equal, which means this is not an arithmetic sequence. Could you please check the sequence again? It seems there might be a mistake.