### Home > APCALC > Chapter 4 > Lesson 4.2.4 > Problem 4-85

4-85.

Rewrite each of the following integral expressions as single integrals.

Translation: three times the area under

betweenand. Write this as a single integral.See hint (a) and then see hint (c).

Since an integral is the area underneath or above a curve, if you take a smaller portion of that area and subtract it from a larger portion, both starting at the same point, what are you left with?