Q. What kind of sequence is this?115,95,75,55,…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: 115,95,75,55,…Are the consecutive differences in the sequence equal? 95−115=−20, 75−95=−20, 55−75=−20. 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.
Check for Geometric Sequence: Now, let's check if the sequence could also be geometric by finding the ratios between consecutive terms. 11595 does not equal 9575, nor does it equal 7555. The ratios are not consistent, so the sequence is not geometric.
Final Conclusion: Based on the previous steps, we can conclude that 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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