Math Sequence
posted by HELP HELP MNHS .
the nth term of a series is 9n7. what is the result of subtracting the kth term from the (k+1)th term?
(with solution pls, thnx)

looks like we can just substitute and evaluate
term(n ) = 9n7
term(k+1) = 9(k+1)  7 = 9k + 2
term(k) = 9k  7
so term(k+1)  term(k)
= 9k+2  (9k7) = 9