Answer
The Sum = 9840
Work Step by Step
Put i = 1 to 8 in $3^{i}$.
The Sum = $3^{1}$ + $3^{2}$ + $3^{3}$ + $3^{4}$ + $3^{5}$ + $3^{6}$ + $3^{7}$ + $3^{8}$ = 3 + 9 + 27 + 81 + 243 + 729 + 2187 + 6561 = 9840
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