If a sequence is in A.P. then there will be a common difference between each term.
(power 0.5 means square root)
2^ 0.5, 8^0.5, 18^0.5, 32^0.5.......
= 1.414, 2.828, 4.242, 5.656....
The common difference is 1.414 every time so the given sequence is in A.P. (arithmetic progression)
i really enjoy learning algebra........ but i always wonder why we have to learn it??? can u please answer to my doubt???