Given the recursive formula for the arithmetic sequence a1=−5, an=an−1+4, find the first three terms of the se

Question

Given the recursive formula for the arithmetic sequence  a1=−5,  an=an−1+4, find the first three terms of the sequence.

GPT-5 mini · Answer

a1 = -5  
a2 = a1 + 4 = -5 + 4 = -1  
a3 = a2 + 4 = -1 + 4 = 3

So the first three terms are −5, −1, 3.

Given the recursive formula for the arithmetic sequence a1=−5, an=an−1+4, find the first three terms of the sequence.