Question

Write the formula for the geometric sequence.
3, 12, 48, 192, …
A. an=4∙3n-1
B. an=4∙3n
C. an=3∙4n-1
D. an=3∙4n

Answer 1

\(\large a_n = a~r^{n-1}\)

you need to plugin first term \(a\)
and, common ratio \(r\)

Answer 2

is the answer C?

Answer 3

Very good guess :) yes !

Answer 4

yaaay! thanks!

Answer 5

np :)