$a_1=-4 \\a_2= 40 \\a_3=-400 \\a_4=4000 \\a_5=-40000$
Work Step by Step
Multiply the common ratio to get the next term to obtain: $a_1=-4 \\a_2=-4(-10) = 40 \\a_3=40(-10)=-400 \\a_4=-400(-10)=4000 \\a_5=4000(-10) = -40000$
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