Q. What kind of sequence is this?91,91,91,91,…Choices:(A) arithmetic(B) geometric(C) both(D) neither
Verify Consecutive Differences: Let's verify if the differences between consecutive terms are uniform. Given sequence: 91,91,91,91,ext... Are the consecutive differences in the sequence equal? 91−91=0, 91−91=0, 91−91=0. The consecutive differences in the sequence are equal and are all zero.
Check Equal Ratios: Let's check whether the ratios between consecutive terms are equal. Given sequence: 91,91,91,91,ext... Are the ratios between consecutive terms in the sequence equal? 91/91=1, 91/91=1, 91/91=1. Yes, the sequence has a common ratio of 1.
Sequence Characteristics: Arithmetic sequence: Consecutive terms have a common difference. Geometric sequence: Consecutive terms have a common ratio. The sequence 91,91,91,91,… has both a common difference of 0 and a common ratio of 1. Therefore, it is both an arithmetic and a geometric sequence.
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