Question

HELP WILL GIVE MEDAL
Write the explicit formula that represents the geometric sequence -2, 8, -32, 128

Answer 1

first have you figure out the common ratio?

Answer 2

you can find this by doing term divided by previous term

Answer 3

the explicit form for geometric sequence is:
\[a_n=a \cdot r^{n-1} \\ \text{ where } a \text{ is first term } \\ \text{ and } r \text{ is common ratio }\]

Answer 4

im confused sorry

Answer 5

with dividing?

Answer 6

well a positive divided by a negative is?

Answer 7

and how many 2 do you need to add to get 8?