Q. What kind of sequence is this?61,74,87,100,…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: 61,74,87,100,ext... Are the consecutive differences in the sequence equal? Let's calculate the differences: 74−61=13, 87−74=13, 100−87=13. The consecutive differences in the sequence are equal.
Identify Arithmetic Sequence: Since the consecutive differences are equal, this indicates that the sequence is an arithmetic sequence. An arithmetic sequence is defined by having a common difference between consecutive terms. In this case, the common difference is 13.
Check for Geometric Sequence: To confirm that this is not a geometric sequence, we need to check if there is a common ratio between consecutive terms. Let's calculate the ratios: 6174≈1.2131, 7487≈1.1757, 87100≈1.1494. The ratios between consecutive terms are not equal, so this is not a geometric sequence.
Final Conclusion: Since we have established that the sequence has a common difference and does not have a common ratio, we can conclude that the sequence is an arithmetic sequence and not a geometric sequence. Therefore, the correct choice is (A) arithmetic.
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