CRMS Calculus 2010 May 14, 2010
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Transcript of CRMS Calculus 2010 May 14, 2010
1
Area
Between
Curves
2
Review:
1. a. State the numerical methods used to calculate the approximate value of the definite integral:
b. State the algebraic method used to calculate the exact value of the definite integral.
Calculus provides a way to find the exact area under a curve by slicing a region into strips, adding the
strips together and then taking the limit.
b
dx
Lengthis
constant
(x, y)
a
dA = y dx∫dAa
b
Area =
3
1. Find points of intersection.
2. Slice region into vertical strips of width dx.
3. Show a representative strip and a sample point.
4. Write a differential (dA) representing the area of the strip.
5. Add up all the strips and take the limit as dx approaches 0.(In other words, integrate.)
4
Method 1: Subtract areas (Gus' method):
Method 1: Integrate with respect to x: Method 1: Integrate with respect to y: