Use the explicit formula to find a recursive formula for the sequence a. Write your answer in simplest form.The recursive formula should depend on a.a=3n−37a = ______
Q. Use the explicit formula to find a recursive formula for the sequence a. Write your answer in simplest form.The recursive formula should depend on a.a=3n−37a = ______
Identify Sequence Type: Identify if the given sequence is geometric or arithmetic.The explicit formula given is a=3n−37, which is a linear function of n and does not involve any exponent terms. Hence, the given sequence is arithmetic.
Find First Term: Find the first term of the sequence using the explicit formula.To find the first term, we substitute n=1 into the explicit formula:a1=3(1)−37=3−37=−34
Find Second Term: Find the second term of the sequence using the explicit formula.To find the second term, we substitute n=2 into the explicit formula:a2=3(2)−37=6−37=−31
Find Common Difference: Find the common difference in the arithmetic sequence.The common difference, d, is the difference between any two consecutive terms. We can calculate it as follows:d=a2−a1=−31−(−34)=−31+34=3
Write Recursive Formula: Write the recursive formula by plugging in the value of the common difference.We can express the nth term of an arithmetic sequence in terms of the (n−1)th term and the common difference d:an=a(n−1)+dSubstituting 3 for d in the recursive formula, we get:an=a(n−1)+3
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