Science:Math Exam Resources/Courses/MATH103/April 2014/Question 04 (a)/Hint 3

The Riemann sum formula (for right endpoints) is

$\underset{a}{\overset{b}{\int }}f(x)\text{d}x=\underset{n\to \mathrm{\infty }}{\lim }\sum _{k=1}^{n}f(x_i)\mathrm{\Delta }x$

where $\mathrm{\Delta }x=\frac{b-a}{n}$. Compare this formula to what is given to determine the unknowns.