Given the second term and fifth term of geometric sequence 1 and 1/1 repectulay find
the common ration
clearly, it is 1
less clear is why you didn't proofread your posting.
Looks like you have a typo at " .... sequence 1 and 1/1 repectualy find .... "
ar = 1
ar^4 = ???
divide them:
r^3 = ?????
sub back into ar = 1
once you have fixed your typo, proceed along the above method