Question

3. A)Find the next number in the sequence.

$1,27, 9, 3, _1_
B) Is the sequence arithmetic, geometric, or neither?

Help me find this answer please

Answer 1

9514 1404 393

Answer:

1/3; geometric

Explanation:

Apparently, your sequence is ...

81, 27, 9, 3, 1, ...

The differences between these numbers vary, but the ratio of each to the one before is a constant:

27/81 = 9/27 = 3/9 = 1/3

The sequence is geometric with a common ratio of 1/3. The next number in the sequence is (1)(1/3) = 1/3.