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The first term in an arithmetic sequence is 12. The third term in the sequence is 4. The tenth term in the sequence is -24.



A. Write the function that could be used to find the nth term of the arithmetic sequence





B. Daelyn said that the recursive formula for this sequence could be described as, “to find the next term of the sequence, add -4 to the previous term.” Do you agree or disagree that this statement is equivalent to the explicit formula that you created in part A? Explain.

1 Answer

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ok i THINK it’s
a. a(n)=12-4(n-1)
b. i agree with Daelyns statement because the common difference is -4. so adding a -4 (subtracting 4) will get you to the next term in the sequence.

i am also doing this lesson so i think that’s correct according to the formula notes i took yesterday what i did was fill in the formula for explicit formula: a(n)= a(1)+d(n-1)
User Henry S
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