Homework Help: math sequence

Posted by robby on Friday, October 14, 2011 at 11:28pm.

the first 5 terms of a linear sequence are given below: 8,6,4,2,0...
What is the 100th term in the sequence?
A. -192
B. -190
C. -108
D. -90
I could figure this out in like 5 minutes, but I know there's a pattern I can't remember to figure it out quicker.

math sequence - Reiny, Saturday, October 15, 2011 at 9:34am
term(n) for an arithmetic sequence is (a+(n-1)d )

your a=8, d=-2 , n=100

term(100) = a + 99d
= 8 + 99(-2) = -190

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