Given Are the First Three Terms of a Sequence That $\frac { 3 } { 1 } , \frac { 3 } { 4 } , \frac { 3 } { 16 }$

Multiple Choice

Given are the first three terms of a sequence that is geometric. Find a1 and r.
- $\frac { 3 } { 1 } , \frac { 3 } { 4 } , \frac { 3 } { 16 }$

A) $a _ { 1 } = \frac { 3 } { 1 } ; r = \frac { 1 } { 10 }$
B) $\mathrm { a } _ { 1 } = \frac { 3 } { 1 } ; \mathrm { r } = \frac { 1 } { 4 }$
C) $a _ { 1 } = \frac { 3 } { 1 } ; r = 4$
D) $\mathrm { a } _ { 1 } = \frac { 3 } { 1 } ; \mathrm { r } = 10$