1. Jan 21, 2008

### wowolala

show that
1/2+1/3+...1/n < $$\int$$dx/x < 1+1/2+1/3+....1/(n-1)

inside the integral is from 1 to n.

thx

Last edited: Jan 22, 2008
2. Jan 21, 2008

### mjsd

don't understand what's going here... but my guess is that you are trying to prove something about how two ways of approximating an integral (one underestimates it, the other overestimates it)... so best way to see this is to draw a diagram and look at the rectangles...

3. Jan 22, 2008

thx, so much