9. Sequences, Series, & Induction
Arithmetic Sequences
2:49 minutesProblem 19a
Textbook Question
Textbook QuestionIn Exercises 19–21, write a formula for the general term (the nth term) of each arithmetic sequence. Do not use a recursion formula. Then use the formula for an to find a20, the 20th term of the sequence. -7, -3, 1, 5 ...
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