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What is the equation for a geometric sequence with a first term of 2 and second term of -8?

What is the equation for a geometric sequence with a first term of 2 and second term of -8?
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What is the equation for a geometric sequence with a first term of 2 and second term of -8?

What is the equation for a geometric sequence with a first term of 2 and second term-example-1
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User Inconnu
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1 Answer

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a(1) = 2
r = a(2)/a(1) = -8/2 = -4


a(n) =a {(r)}^(n - 1) \\ a(n) = 2 {( - 4)}^(n - 1)
Answer will be D.

!! Hope It Helps !!
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User Andrew Coleson
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