SOLUTION
In this question, we are meant to find the sum of the first n terms of the sequence.
In this case, n = 10.
Sum of n terms, Sn = a ( r ^n - 1 ) / r - 1 ......... Since the sequence is a Geometric Sequence.
Sn = Sum of n terms
a = first term = - 8
r = common ratio = -32 / - 8 = 4
S10 = -8 ( 4 ^10 - 1 ) / 4 - 1
S10 = -8 ( 1048576 - 1 ) / 3
S10 = -8 X 1048575 / 3
S10 = - 8388600 / 3
S10 = - 2, 796 , 200