Question 881022
{{{A(n) = (1/2)(-3)^(n-1)}}}


{{{A(8) = (1/2)(-3)^(8-1)}}} Plug in {{{n = 8}}}


{{{A(8) = (1/2)(-3)^7}}}


{{{A(8) = (1/2)(-2187)}}}


{{{A(8) = -1093.5}}} So it's choice B)