find an equation for the nth term of the geometric sequence where the second and fifth terms are -8 and 512, respectively. A. an=2*(-4)^n+1 B. an=2*4^n-1 C. an=2*(-4)^n-1 D. an=2*4^n @dan815 @michele_laino @nincompoop @campbell @paki @nnesha @e.mccormick

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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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if a1 is the first term and r = common ratio second term = a1r = -8 fifth term = a1r^4 = 512 dividing a1r^4 / a1r = 512/-8 r^3 = -64 therefor r = -4
now you can see that a1*-4 = -8 so now you can find what a1 is

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Other answers:

would it be c?
nth term = a1r^(n-1) so an = 2*(-4)^(n-1)
yea c is correct
can u help me with another one?

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