Question 139711: I need help with this problem. I do not know where to begin. Can someone please help me. Thank you. This is from a worksheet.
Write a formula for the nth term of the infinite sequence whose nth term is given.
7.) -4,-2,0,2,4...
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! -4,-2,0,2,4...
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a(1) = -4
d = -2--4 = 2
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a(n) = a(1) + (n-1)d
a(n) = -4 + (n-1)*2
a(n) = -4 +2n-2
a(n) = -6 + 2n
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Cheers,
Stan H.
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