If the sequence is geometric, find the common ratio. If the sequence is not geometric, say so.
-$$\frac { 1 } { 7 } , \frac { 1 } { 9 } , \frac { 1 } { 11 } , \frac { 1 } { 13 }$$
A) 2
B) $\frac { 1 } { 2 }$
C) $2 \frac { 1 } { 2 }$
D) Not geometric

Question

Quizplus · Accepted Answer

The sequence is not geometric because the ratio between consecutive terms is not constant. The ratios between terms are $\frac{1/9}{1/7} = \frac{7}{9}$, $\frac{1/11}{1/9} = \frac{9}{11}$, and $\frac{1/13}{1/11} = \frac{11}{13}$, which are all different.

If the Sequence Is Geometric, Find the Common Ratio 17,19,111,113\frac { 1 } { 7 } , \frac { 1 } { 9 } , \frac { 1 } { 11 } , \frac { 1 } { 13 }71​,91​,111​,131​

If the Sequence Is Geometric, Find the Common Ratio $\frac { 1 } { 7 } , \frac { 1 } { 9 } , \frac { 1 } { 11 } , \frac { 1 } { 13 }$