While counting chairs in the lunch room, Krysta noticed that there were 3 chairs in the first row, 9 chairs in the second row, 27 chairs in the third row, and 81 chairs in the fourth row. What kind of sequence is this?Choices:(A) arithmetic(B) geometric(C) both(D) neither
Q. While counting chairs in the lunch room, Krysta noticed that there were 3 chairs in the first row, 9 chairs in the second row, 27 chairs in the third row, and 81 chairs in the fourth row. What kind of sequence is this?Choices:(A) arithmetic(B) geometric(C) both(D) neither
Identify Chairs in Rows: Krysta noticed a certain number of chairs in each row.First row: 3 chairsSecond row: 9 chairsThird row: 27 chairsFourth row: 81 chairsLet's list the number of chairs in the given order.Sequence: 3,9,27,81
List Chair Numbers:3,9,27,81Are the differences between consecutive terms equal?9−3=627−9=1881−27=54The differences are not the same, so it is not an arithmetic sequence.
Check for Arithmetic Sequence:3,9,27,81Are the consecutive ratios of the sequence equal?39=3927=32781=3The ratio between each consecutive term is the same, which is 3.
Check for Geometric Sequence: The sequence has:no common difference.a common ratio of 3.What type of sequence is 3,9,27,81?Since the sequence has a common ratio, it is a geometric sequence.
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