Given Are the First Three Terms of a Sequence That $\mathrm { z } , - 11 \mathrm { z } , 121 \mathrm { z }$

Multiple Choice

Given are the first three terms of a sequence that is geometric. Find a1 and r.
- $\mathrm { z } , - 11 \mathrm { z } , 121 \mathrm { z }$

A) $a _ { 1 } = z ; d = - 11$
B) $a _ { 1 } = z ; r = - 11$
C) $a _ { 1 } = z ; r = 11$
D) $a _ { 1 } = z ; r = - 11 z$