Q. Complete the recursive formula of the arithmetic sequence−3,−1,1,3,…b(1)=□b(n)=b(n−1)+
Identify first term: Identify the first term of the sequence. The first term is given as −3.
Determine common difference: Determine the common difference by subtracting the first term from the second term. The second term is −1, so the common difference is −1−(−3)=2.
Write recursive formula: Write the recursive formula using the first term and the common difference. The recursive formula for an arithmetic sequence is b(n)=b(n−1)+d, where d is the common difference.
Substitute common difference: Substitute the common difference into the recursive formula. Since the common difference is 2, the recursive formula becomes b(n)=b(n−1)+2.
Include initial condition: Include the initial condition that defines the first term of the sequence. The initial condition is b(1)=−3.
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