What is the recursive rule for an=4n−1? a1=4;an=an−1−1 a1=3;an=an−1+4 a1=−1;an=an−1+4 a1=3;an=an−1−1
2 answers:
Answer:
B is correct
Step-by-step explanation:
Plug in n = 1 into the nth term formula a(n) = 4n-1 a(1) = 4*1-1 a(1) = 3 So the first term is 3 The second term will be 7 because we add on 4 each time, as indicated by the slope of 4. This is also known as the common difference. So the nth term is found by adding 4 to the (n-1)st term, in other words, a(n) = a(n-1)+4 ----------------------------------------------------------------------------In summary, the answer is a1=3; an=an-1+4 which is choice B
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