Answers

2016-07-20T19:11:23+08:00
In order to get the answer, you need to use the formula:

an = a1 + (n-1)d

401 = 5 + (n-1)4
401 = 5 + 4n - 4
401 = 1 + 4n
401 - 1 = 4n
400 = 4n
400/4 = 4n/4
100 = n

Therefore, 401 is the a100/100th term
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