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Q: What is the 400th term of the sequence 8 20 32 44 56 when using the explicit formula an equals a1 plus n minus 1 asterisk d?
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The simple formula for the nth term of an arithmetic sequence is an equals 4n plus 16 What is the explicit formula corresponding to the simple formula?

Tn=4n+16 If you see, it goes like 20, 24,28,..... So, Tn is just equal to 20+(n-1)4, with first term=20, common difference=4


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