Hint: Let n_j=p_1*p_2*...*p_j
Where p_i is the i-th prime.
I realized i spell the topic wrong! Euler's Totient Function.
I read from a textbook this question and i feel dumbfounded because I don't know the answer...
Find a sequence of integers n_j such that phi(n_j)/n_j=>0 as j=> infinity.
I was thinking about using the general formula, (1-1/p_1).... (1-1/p_n) but it doesn't seem correct. Does anyone want to take a hit at this?