# Geometric progressiob

If the sum of four consective terms of geometric progression is 80 and arithmetic mean of second and fourth term is 30 then find terms?

Correct result:

a =  2
b =  6
c =  18
d =  54

#### Solution:

$b=q \cdot \ a=3 \cdot \ 2=6$
$c=q \cdot \ b=3 \cdot \ 6=18$
$d=q \cdot \ c=3 \cdot \ 18=54$

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