Find a_8 for the geometric sequence 4,−12,36,...

Adison Rogers

Adison Rogers

Answered question

2022-11-20

Find a 8 for the geometric sequence 4,−12,36,...

Answer & Explanation

Incampo5in

Incampo5in

Beginner2022-11-21Added 10 answers

To find the value of a term in a GP, you need to know:
a 1 , r and n
a 1 = 4
r = - 12 4 = - 3
for a 8 , n = 8
a n = a 1 × r n - 1 the general term
a 8 = 4 × ( - 3 ) 7
a 8 = - 8 , 748

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