Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given.
-$$\mathrm { a } = 7 ; \mathrm { r } = - 2$$
A) $a _ { 5 } = - 56 ; a _ { n } = 7 \cdot ( - 2 ) ^ { n }$
B) $\mathrm { a } _ { 5 } = 112 ; \mathrm { a } _ { \mathrm { n } } = 7 \cdot ( - 2 ) ^ { \mathrm { n } }$
C) $\mathrm { a } _ { 5 } = 112 ; \mathrm { a } _ { \mathrm { n } } = 7 \cdot ( - 2 ) ^ { \mathrm { n } - 1 }$
D) $a _ { 5 } = - 56 ; a _ { n } = 7 \cdot ( - 2 ) ^ { n - 1 }$

Question

Quizplus · Accepted Answer

The Answer of Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given.
-$$\mathrm { a } = 7 ; \mathrm { r } = - 2$$
A) $a _ { 5 } = - 56 ; a _ { n } = 7 \cdot ( - 2 ) ^ { n }$
B) $\mathrm { a } _ { 5 } = 112 ; \mathrm { a } _ { \mathrm { n } } = 7 \cdot ( - 2 ) ^ { \mathrm { n } }$
C) $\mathrm { a } _ { 5 } = 112 ; \mathrm { a } _ { \mathrm { n } } = 7 \cdot ( - 2 ) ^ { \mathrm { n } - 1 }$
D) $a _ { 5 } = - 56 ; a _ { n } = 7 \cdot ( - 2 ) ^ { n - 1 }$

Find the Fifth Term and the Nth Term of the Geometric