Question

what is the common ratio for the geometric sequence 1/128, 1/16, 1/2, 4

Answer 1

divide the 1st term by 2nd term

Answer 2

\[\frac{ 1 }{ 128 }\div \frac{ 1 }{ 16 }=\frac{ 16 }{ 128 }=1/8\]

Answer 3

so it would be 1/8?

Answer 4

yeah

Answer 5

i thought it would had been -4

Answer 6

no..
for germetric series common ratio is given by
\[\frac{ a_2 }{ a_1 }=\frac{ a_3 }{ a_2 }=.....\]

Answer 7

ooohhhh ok thanks alot :D

Answer 8

now you check that the result is true by dividing the third term by 2nd term