Find the n'th term of the sequence :

a) 1/2, 2/3, 3/4, 4/5
b) 5/1^2, 5/2^2, 5/3^2, 5/4^2

Hint: The first sequence is:

1/(1+1), 2/(2+1), 3/(3+1), 4/(4+1)