1. ## Riemann sum

The following sum
is a right Riemann sum for a certain definite integral
using a partition of the interval into subintervals of equal length.
Then the upper limit of integration must be: =
and the integrand must be the function =

can someone help me with this

2. Originally Posted by dat1611
The following sum
is a right Riemann sum for a certain definite integral
using a partition of the interval into subintervals of equal length.
Then the upper limit of integration must be: =
and the integrand must be the function =

can someone help me with this
Suppose b=4, then what?

CB

3. im not really sure what would the integral be

4. What about $\displaystyle \int\limits_1^4 {\frac{{dx}}
{{1 + x}}}?$

5. im getting log(5/2) but that doesnt seem to be working

6. Try $\displaystyle \ln\left(\frac{5}{2}\right)$

7. thats not right either

8. I think you will find that there is a mistake in the program.

9. Originally Posted by dat1611
im getting log(5/2) but that doesnt seem to be working
It is asking for the integrand not the integral, that is the function being integrated.

CB

10. i tried just 1/(1+x) but that not it either

11. $\displaystyle \int_1^4 \frac{1}{x} \, dx$

12. thats not right either i need the function but none of this is working

13. Originally Posted by dat1611
thats not right either i need the function but none of this is working
is this for some online answering system?

14. yeah

15. Originally Posted by dat1611
yeah
The function has the form $\displaystyle f(x) = \frac{3}{a + x}$. I will leave you the job of working out what the value of a is. I will also leave you the job of finding the value of b.