What is the sum of the first 10 terms in the geometric sequence - 3 6 - 12 24 - 48

Use the formula for the sum of a geometric sequence:

Sum = (a (r^n - 1)) / (r - 1)

where a is the first term, - 3

r is the common ratio, - 2

and n is the number of terms

Thus,

Sum = ((-3) ((-2) ^10 - 1)) / (-2-1) = 1023