Question

Who knows how to do Reimann Sums?

Answer 1

Oh dear... I might be able to help but I haven't done them in ages.

Answer 2

Estimate the area under f(x)=lnx from 1 to 6, use 10 left rectangles.

Answer 3

Gimme a minute to think about this one :P
I am a tad rusty.

Answer 4

which sum do you want? upper riemann sum or lower riemann sum?

Answer 5

I'm not sure, all it says is left rectangles.

Answer 6

then this is lower sum
http://www.wolframalpha.com/input/?i=Sum%5B+5%2F10+Log%281++%2B+i*5%2F10%29%2C%7Bi%2C+0%2C+9%7D%5D
\[ \sum_{i=0}^9 \frac{6-1}{10 } \log(1 + i * (6-1)/10)\]

Answer 7

if you want upper sum then just change index by 1 to 10