Question

area and between two curves

Answer 1

The formula for the area between two curves is:
\[\int\limits_{a}^{b} f(x)-g(x) dx\]
Where \(f(x)\) and \(g(x)\) are the two curves.

patrickJMT has a nice explanation on YouTube as well: http://www.youtube.com/watch?v=DRFyNHdVgUA

Answer 2

\(\int\limits_{a}^{b} (f(x)-g(x) )dx\)

Be careful if g(x) becomes greater than f(x) on the interval.