What is the expression for the nth term of the geometric sequence 4,-20,100

asked Oct 27, 2017 155k views

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Hello,

$u_(1) =4\\ u_(2) =-20=4*(-5)\\ u_(3) =100=4*(-5)^2\\ ....\\\\ \boxed{ u_(n) =4*(-5)^(n-1)\\}$

Swetank answered Nov 2, 2017

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