Question

Help!!!!

Answer 1

It there is an AP then

\[d=T_2-T_1=T_3-T_2\]


If there is GP then

\[r=T_2/T_1=T_3/T_2\]


Best of luck with that :)

Answer 2

its E

Answer 3

for arithmetic sequence difference of any two consecutive term must be equal
where as for geometric sequence the ratio of consecutive term must be equal