Work Step by Step
According to the exercise: $a_1=1,a_2=4$ $a_3=a_2-a_1=4-1=3$ $a_4=a_3-a_2=3-4=-1$ $a_5=a_4-a_3=-1-3=-4$
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.