I'm having some trouble with the following problems...
Sketch the region bounded by the graphs of the functions and find the area of the region:
1) y=x^3 - 2x + 1, y=-2x, x=1
2) y=(e^(1/x))/(x^2), y=0, x=1, x=3
Write the definite integrals that represent the area of the region:
3) y=4/x, y=x, x=1, x=4
4) Find the area of the region enclosed by the graphs of f(x)=sinx and g(x)=cosx between x=pi/4 and x=5pi/4.
I have absolutely no idea what to do for these probs, so any help would be much appreciated. Thanks