Answer:
Step-by-step explanation:
To find the common ratio ( r) of a given sequence , divide the previous term by the next term.
That's
[tex]r = - \frac{51}{17} = - 3 \: \: \\ or \\ r = - \frac{153}{51} = - 3[/tex]
Since the common ratio is the same for any of the terms chosen , the common ratio is - 3
Hope this helps you