### Home > CALC > Chapter 1 > Lesson 1.4.2 > Problem 1-153

1-153.

For *f*(*x*) = 3*x* cos *x*, approximate

Answers vary, but be sure to take into account the width of the rectangles and/or trapezoids.

1-153.

For *f*(*x*) = 3*x* cos *x*, approximate

Answers vary, but be sure to take into account the width of the rectangles and/or trapezoids.