Q. What kind of sequence is this?131,118,105,92,…Choices:(A) arithmetic(B) geometric(C) both(D) neither
Check Arithmetic Sequence: Let's first check if the sequence is arithmetic by finding the differences between consecutive terms. Given sequence: 131,118,105,92,…Calculate the differences: 118−131=−13, 105−118=−13, 92−105=−13.
Calculate Common Difference: Since the differences between consecutive terms are equal, we can conclude that the sequence has a common difference of −13.
Confirm Arithmetic Sequence: An arithmetic sequence is defined by having a constant difference between its terms. Since we have found a common difference, this sequence is arithmetic.
Check Geometric Sequence: Now, let's check if the sequence could also be geometric by finding the ratios between consecutive terms. Calculate the ratios: 131118, 118105, 10592.
Calculate Ratios: Perform the calculations: 131118≈0.9008, 118105≈0.8898, 10592≈0.8762.
Confirm Not Geometric: Since the ratios between consecutive terms are not equal, the sequence does not have a common ratio and therefore is not a geometric sequence.
Final Conclusion: Based on the calculations, the sequence is arithmetic because it has a common difference, but it is not geometric because it does not have a common ratio.
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