Question

considerado a p.g:1,3,9,27

a) 1 termo (A1)
b) a razão (Q)

Answer 1

P.G.(1 ,3 ,9 ,27 )

$a)~~a_1=1 \\ \\ b)~~ \\ a_1=1 \\ a_2=3 \\ a_3=9 \\ \\ q=a_2\div a_1 \\ \\ q=3\div1 \\ \\ q=3$