Question 310023
Write an equation for the nth term of -23,38,99,160
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Comment: This is an arithmetic sequence with 
a(1) = -23 and d = 99-38 = 61
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Find the pattern for the nth term by looking at
the pattern based on the 1st term.
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1st term: -23
2nd term: -23 + 61 = 38
3rd term: -23 + 2(61) = 99
4th term: -23 + 3(61) = 160
...
nth term: -23 + (n-1)61
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Simplify the nth term equation:
a(n) = -23 + 61n-61
a(n) = 61n - 84
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Ans: c
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Cheers,
Stan H.
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solution choices are
a. a(n)=38n-61
b. a(n)=61n-24
c. a(n)=61n-84
d. a(n)=-46n