Respuesta :
Answer:
Common ratio = 7
Step-by-step explanation:
If a sequence is a geometric sequence, given in the form of a, a(r), a(r)² ..........
common ratio of the given sequence will be = [tex]\frac{ar}{a}=r[/tex]
Now we apply this rule in the given sequence 3, 21, 147,.............
Then the common ratio r = [tex]\frac{\text{Second term}}{\text{First term}}[/tex]
r = [tex]\frac{21}{3}[/tex]
r = 7
This can be applied in 2nd and 3rd term but common ratio will remain same as 7.
Therefore, common ratio = 7 is the answer.
