I'm having trouble figuring this one out:

$\displaystyle

lim_{n->infinity}\sum\limits_{i = 1}^{\color{red}n} {\frac{{f\left( {x_i } \right)}}{n}}

$

when f(x)=1/x between the interval [1,2]

I keep on getting 1/infinity and that's zero, but the correct answer is appr. .693. thank you

Note: its actually the summation of f(xsubi)*change in x but (2-1)/n is 1/n so i simplified it