Question

81,64,47,30,13,... and 3,12,48,192,768,... which of the two sequence is arithmetic?explain?
please help!​

Answer 1

i) 81,64,47,30,13........
a=81
d=64-81=> -7
Also, d= 47-64=> -17

Thus this does not follow the rule of having same common differences
This is not an AP

ii) 3,12,48,192,768
a=3
d=12-3 =>9
Also, d=48-12=>36


Thus this does not follow the rule of having same common differences
This is not an AP

Neither of these are an AP