Answer:
-5,120
Step-by-step explanation:
The first term (a1) of this sequence is -5. The common ratio (r) is -10/-5 = 2. So, the general formula for the n-th term tells you ...
an = -5·2^(n-1)
Putting 11 where n is in the formula, we find the 11th term to be ...
a11 = -5·2^(11 -1) = -5·1024 = -5,120
The 11th term in the sequence is -5,120.
