Answer:
X=20
Step-by-step explanation:
The difference is that the arithmetic sequence uses addition and geometric sequence uses multiplication. The same is that they both have a rule To find the next term
a + b + c = 30 ;
a = 6c ;
a = 2b ;
Then, c = a / 6 and b = a / 2 ;
a / 6 + a / 2 + a = 30 ;
a / 6 + 3a / 6 + 6a / 6 = 180 / 6 ;
10a = 180 ;
a = 18 ;
b = 9 ;
c = 3.
Good luck !
Answer:
B. AC
Step-by-step explanation:
