Answer:
B, C, D and E are correct options
Step-by-step explanation:
Here, we want to get the correct options;
a. We simply divide the next term by the previous term so that we get the common ratio
That would be 16/-8 = -32/16 = -2
As we can see, the common ratio is -2 which means that the option cannot be correct
b. The 5th term is mathematically;
ar^4 = -8 * (-2)^4 = -8 * 16 = -128
This is correct
c. The 7th term is
ar^6 = -8 * (-2)^6 = -512
5th term is ar^4 = -8 * (-2)^4 = -128
So -512/-128 = 4
As we can see, this option is correct
d. 8th term is 1024
8th term is ar^7
= -8 * (-2)^7 = 1024 which is correct
e. 10th term is ar^9 = -8 * (-2)^9 = 4096
9th term is ar^8 = -8 * (-2)^8 = -2048
This is correct