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Mathematics 17 Online
OpenStudy (anonymous):

Write an expression for the general or nth term, an, for the geometric sequence. 1, -4, 16, -64, . .

OpenStudy (amoodarya):

a(n)=(-4)^(n-1) put 1 you have 1 put 2 you have -4 put 3 you have +16 and so on

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