SOLUTION: Write the explicit formula for a_n given a1=-7 and a common difference of 1/2

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Question 458200: Write the explicit formula for a_n given a1=-7 and a common difference of 1/2
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Write the explicit formula for a(n) given
a(1)=-7 and a common difference of 1/2
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a(n) = a(1) + (n-1)d
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a(n) = -7 + (n-1)(1/2)
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a(n) = -7 + (n/2)-(1/2)
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a(n) = (-15/2) + (n/2)
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Cheers,
Stan H.
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