cgsc7h6adekathenguy cgsc7h6adekathenguy

24-12-2016
Mathematics

contestada

HELP PLEASE
What is the common ratio of the geometric sequence whose second and fourth terms are 6 and 54, respectively?
a.1
b.2
c.3
d.4

Respuesta :

HomertheGenius HomertheGenius

26-12-2016

a 2 = a 1 · r = 6
a 4 = a 1 · r³ = 54
6 / r = 54 / r³
6 r³ = 54 r / : r
6 r² = 54
r² = 54 : 6
r² = 9
r = √ 9 = 3
Answer:
C ) 3

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