### Home > PC3 > Chapter 13 > Lesson 13.3.2 > Problem13-120

13-120.

Given $h\left(x\right) = 2x^{2} − 1$, approximate the area under the curve for $1\le x\le3$ using five trapezoids.

Approximate the area using both left and right endpoint rectangles.
Then average the results to obtain the trapezoidal approximation.