If a₁ = 10 and an = -4an-1 then find the value of a4.

asked Dec 1, 2024 91.8k views

5 votes

If a₁ = 10 and an
=
-4an-1 then find the value of a4.

by Tjm

8.0k points

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7 votes

Answer:

Explanation:

$a_(1) =10\\a_(n)=-4a_(n-1)\\put~n=2,3,4\\a_(2)=-4a{1}=-4(10)=-40\\a_(3)=-4a_(2)=-4(-40)=160\\a_(4)=-4a_(3)=-4(160)=-640$

Ariando answered Dec 6, 2024