Let f(x) = 1/x + 1. Find f(1)*f(2)*f(3) ... f(2017)*f(2018).
the answere would be 2019, beacuse if you start solving it, you'll see the pattern (2/1 * 3/2 * 4/3 *...*2018/2017 * 2019/2018) so it will all simplify down to 2019.
nice explanation, itzme!
