### Home > APCALC > Chapter 4 > Lesson 4.3.2 > Problem 4-126

4-126.

Let

Notice that the bounds are reverse. What does that 'do' to the way we evaluate area?

Two shifts happen to the integrand: It is shifted two units up. It is shifted two units right. The bounds also changed.

Shifting up

units is like adding the integral: In other words, it's like adding a rectangle with height

and base . Shifting an integral to the right could make it impossible to evaluate.

Fortunately, in this case, the bounds also shiftedunits to the right.