Q. Find the common ratio of the geometric sequence 18,162,1458,…Answer:
Identify type of sequence: Identify the type of sequence.The given sequence is 18,162,1458,… Since each term is getting larger and appears to be a multiple of the previous term, it suggests that the sequence is geometric.
Calculate common ratio: Calculate the common ratio.To find the common ratio, divide the second term by the first term.Common ratio r = 18162 = 9
Verify common ratio: Verify the common ratio with the next term.To ensure that the common ratio is correct, divide the third term by the second term.1621458=9This confirms that the common ratio is indeed 9.