Calculus
Calculus
7th Edition
ISBN: 9781524916817
Author: SMITH KARL J, STRAUSS MONTY J, TODA MAGDALENA DANIELE
Publisher: Kendall Hunt Publishing
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Chapter 6, Problem 1PE
To determine

To describe: The process for finding the area between two curves.

Expert Solution & Answer
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Explanation of Solution

The process for finding the area between two curves:

Suppose f and g are functions such that f(x)g(x) on the interval [a,b] , as shown in Figure 6.1.

To find the area of the region R between the curves defined by y=f(x) and y=g(x) from x=a to x=b , subtract the area between the lower curve y=g(x) and the x-axis from the area between the upper curve y=f(x) and the x-axis.

That is,

  Area of R=abf(x)dxabg(x)dx=ab[f(x)g(x)]dx

Suppose f and g are continuous such that f(x)g(x) on the interval [a,b] .

To find the area of the region between the curves defined by y=f(x) and y=g(x) from x=a to x=b , choose a partition

  [x0=a,x1,x2,...,xn=b]

of the interval [a,b] and a representative number xk+ from each subinterval [xk1,xk] .

For each index k , with k=1,2,...,n , construct a rectangle of width,

  Δxk=xkxk1

and height,

  f(xk+)g(xk+)

equal to the vertical distance between the two curves at x=xk+ .

Refer to the approximating rectangle as a vertical strip which is shown in Figure 6.3.

The representative rectangle has area

  ΔAk=[f(xk+)g(xk+)]Δxk

And the total area between the curves y=f(x) and y=g(x) can be estimated by the Riemann sum

  An=k=1n[f(xk+)g(xk+)]Δxk .

Increase the number of subdivision points in the partition P in such a way that the norm P approaches 0 .

Thus, the region between the two curves has area

  A=limP0k=1n[f(xk+)g(xk+)]Δxk

This is the integral of the function f(x)g(x) over the interval [a,b] .

Using all the above observations, the area between the two curves can be defined as,

If f and g are continuous and satisfy f(x)g(x) on the closed interval [a,b] , then the area between the two curves y=f(x) and y=g(x) is given by

  A=ab[f(x)g(x)]dx .

Conclusion: Thus, the area between two curves is A=ab[f(x)g(x)]dx .

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Chapter 6 Solutions

Calculus

Ch. 6.1 - Prob. 11PSCh. 6.1 - Prob. 12PSCh. 6.1 - Prob. 13PSCh. 6.1 - Prob. 14PSCh. 6.1 - Prob. 15PSCh. 6.1 - Prob. 16PSCh. 6.1 - Prob. 17PSCh. 6.1 - Prob. 18PSCh. 6.1 - Prob. 19PSCh. 6.1 - Prob. 20PSCh. 6.1 - Prob. 21PSCh. 6.1 - Prob. 22PSCh. 6.1 - Prob. 23PSCh. 6.1 - Prob. 24PSCh. 6.1 - Prob. 25PSCh. 6.1 - Prob. 26PSCh. 6.1 - Prob. 27PSCh. 6.1 - Prob. 28PSCh. 6.1 - Prob. 29PSCh. 6.1 - Prob. 30PSCh. 6.1 - Prob. 31PSCh. 6.1 - Prob. 32PSCh. 6.1 - Prob. 33PSCh. 6.1 - Prob. 34PSCh. 6.1 - Prob. 35PSCh. 6.1 - Prob. 36PSCh. 6.1 - Prob. 37PSCh. 6.1 - Prob. 38PSCh. 6.1 - Prob. 39PSCh. 6.1 - Prob. 40PSCh. 6.1 - Prob. 41PSCh. 6.1 - Prob. 42PSCh. 6.1 - Prob. 43PSCh. 6.1 - Prob. 44PSCh. 6.1 - Prob. 45PSCh. 6.1 - Prob. 46PSCh. 6.1 - Prob. 47PSCh. 6.1 - Prob. 48PSCh. 6.1 - Prob. 49PSCh. 6.1 - Prob. 50PSCh. 6.1 - Prob. 51PSCh. 6.1 - Prob. 52PSCh. 6.1 - Prob. 53PSCh. 6.1 - Prob. 54PSCh. 6.1 - Prob. 55PSCh. 6.1 - Prob. 56PSCh. 6.1 - Prob. 57PSCh. 6.1 - Prob. 58PSCh. 6.1 - Prob. 59PSCh. 6.1 - Prob. 60PSCh. 6.2 - 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Prob. 43PSCh. 6.3 - Prob. 44PSCh. 6.3 - Prob. 45PSCh. 6.3 - Prob. 46PSCh. 6.3 - Prob. 47PSCh. 6.3 - Prob. 48PSCh. 6.3 - Prob. 49PSCh. 6.3 - Prob. 50PSCh. 6.3 - Prob. 51PSCh. 6.3 - Prob. 52PSCh. 6.3 - Prob. 53PSCh. 6.3 - Prob. 54PSCh. 6.3 - Prob. 55PSCh. 6.3 - Prob. 56PSCh. 6.3 - Prob. 57PSCh. 6.3 - Prob. 58PSCh. 6.3 - Prob. 59PSCh. 6.3 - Prob. 60PSCh. 6.4 - Prob. 1PSCh. 6.4 - Prob. 2PSCh. 6.4 - Prob. 3PSCh. 6.4 - Prob. 4PSCh. 6.4 - Prob. 5PSCh. 6.4 - Prob. 6PSCh. 6.4 - Prob. 7PSCh. 6.4 - Prob. 8PSCh. 6.4 - Prob. 9PSCh. 6.4 - Prob. 10PSCh. 6.4 - Prob. 11PSCh. 6.4 - Prob. 12PSCh. 6.4 - Prob. 13PSCh. 6.4 - Prob. 14PSCh. 6.4 - Prob. 15PSCh. 6.4 - Prob. 16PSCh. 6.4 - Prob. 17PSCh. 6.4 - Prob. 18PSCh. 6.4 - Prob. 19PSCh. 6.4 - Prob. 20PSCh. 6.4 - Prob. 21PSCh. 6.4 - Prob. 22PSCh. 6.4 - Prob. 23PSCh. 6.4 - Prob. 24PSCh. 6.4 - Prob. 25PSCh. 6.4 - Prob. 26PSCh. 6.4 - Prob. 27PSCh. 6.4 - Prob. 28PSCh. 6.4 - Prob. 29PSCh. 6.4 - Prob. 30PSCh. 6.4 - Prob. 31PSCh. 6.4 - Prob. 32PSCh. 6.4 - Prob. 33PSCh. 6.4 - 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Prob. 25PSCh. 6.5 - Prob. 26PSCh. 6.5 - Prob. 27PSCh. 6.5 - Prob. 28PSCh. 6.5 - Prob. 29PSCh. 6.5 - Prob. 30PSCh. 6.5 - Prob. 31PSCh. 6.5 - Prob. 32PSCh. 6.5 - Prob. 33PSCh. 6.5 - Prob. 34PSCh. 6.5 - Prob. 35PSCh. 6.5 - Prob. 36PSCh. 6.5 - Prob. 37PSCh. 6.5 - Prob. 38PSCh. 6.5 - Prob. 39PSCh. 6.5 - Prob. 40PSCh. 6.5 - Prob. 41PSCh. 6.5 - Prob. 42PSCh. 6.5 - Prob. 43PSCh. 6.5 - Prob. 44PSCh. 6.5 - Prob. 45PSCh. 6.5 - Prob. 46PSCh. 6.5 - Prob. 47PSCh. 6.5 - Prob. 48PSCh. 6.5 - Prob. 49PSCh. 6.5 - Prob. 50PSCh. 6.5 - Prob. 51PSCh. 6.5 - Prob. 52PSCh. 6.5 - Prob. 53PSCh. 6.5 - Prob. 54PSCh. 6.5 - Prob. 55PSCh. 6.5 - Prob. 56PSCh. 6.5 - Prob. 57PSCh. 6.5 - Prob. 58PSCh. 6.5 - Prob. 59PSCh. 6.5 - Prob. 60PSCh. 6.6 - Prob. 1PSCh. 6.6 - Prob. 2PSCh. 6.6 - Prob. 3PSCh. 6.6 - Prob. 4PSCh. 6.6 - Prob. 5PSCh. 6.6 - Prob. 6PSCh. 6.6 - Prob. 7PSCh. 6.6 - Prob. 8PSCh. 6.6 - Prob. 9PSCh. 6.6 - Prob. 10PSCh. 6.6 - Prob. 11PSCh. 6.6 - Prob. 12PSCh. 6.6 - Prob. 13PSCh. 6.6 - Prob. 14PSCh. 6.6 - Prob. 15PSCh. 6.6 - Prob. 16PSCh. 6.6 - Prob. 17PSCh. 6.6 - Prob. 18PSCh. 6.6 - Prob. 19PSCh. 6.6 - Prob. 20PSCh. 6.6 - Prob. 21PSCh. 6.6 - Prob. 22PSCh. 6.6 - Prob. 23PSCh. 6.6 - Prob. 24PSCh. 6.6 - Prob. 25PSCh. 6.6 - Prob. 26PSCh. 6.6 - Prob. 27PSCh. 6.6 - Prob. 28PSCh. 6.6 - Prob. 29PSCh. 6.6 - Prob. 30PSCh. 6.6 - Prob. 31PSCh. 6.6 - Prob. 32PSCh. 6.6 - Prob. 33PSCh. 6.6 - Prob. 34PSCh. 6.6 - Prob. 35PSCh. 6.6 - Prob. 36PSCh. 6.6 - Prob. 37PSCh. 6.6 - Prob. 38PSCh. 6.6 - Prob. 39PSCh. 6.6 - Prob. 40PSCh. 6.6 - Prob. 41PSCh. 6.6 - Prob. 42PSCh. 6.6 - Prob. 43PSCh. 6.6 - Prob. 44PSCh. 6.6 - Prob. 45PSCh. 6.6 - Prob. 46PSCh. 6.6 - Prob. 47PSCh. 6.6 - Prob. 48PSCh. 6.6 - Prob. 49PSCh. 6.6 - Prob. 50PSCh. 6.6 - Prob. 51PSCh. 6.6 - Prob. 52PSCh. 6.6 - Prob. 53PSCh. 6.6 - Prob. 54PSCh. 6.6 - Prob. 55PSCh. 6.6 - Prob. 56PSCh. 6.6 - Prob. 57PSCh. 6.6 - Prob. 58PSCh. 6.6 - Prob. 59PSCh. 6.6 - Prob. 60PSCh. 6 - Prob. 1PECh. 6 - Prob. 2PECh. 6 - Prob. 3PECh. 6 - Prob. 4PECh. 6 - Prob. 5PECh. 6 - Prob. 6PECh. 6 - Prob. 7PECh. 6 - Prob. 8PECh. 6 - Prob. 9PECh. 6 - Prob. 10PECh. 6 - Prob. 11PECh. 6 - Prob. 12PECh. 6 - Prob. 13PECh. 6 - Prob. 14PECh. 6 - Prob. 15PECh. 6 - Prob. 16PECh. 6 - Prob. 17PECh. 6 - Prob. 18PECh. 6 - Prob. 19PECh. 6 - Prob. 20PECh. 6 - Prob. 21PECh. 6 - Prob. 22PECh. 6 - Prob. 23PECh. 6 - Prob. 24PECh. 6 - Prob. 25PECh. 6 - Prob. 26PECh. 6 - Prob. 27PECh. 6 - Prob. 28PECh. 6 - Prob. 29PECh. 6 - Prob. 30PECh. 6 - Prob. 1SPCh. 6 - Prob. 2SPCh. 6 - Prob. 3SPCh. 6 - Prob. 4SPCh. 6 - Prob. 5SPCh. 6 - Prob. 6SPCh. 6 - Prob. 7SPCh. 6 - Prob. 8SPCh. 6 - Prob. 9SPCh. 6 - Prob. 10SPCh. 6 - Prob. 11SPCh. 6 - Prob. 12SPCh. 6 - Prob. 13SPCh. 6 - Prob. 14SPCh. 6 - Prob. 15SPCh. 6 - Prob. 16SPCh. 6 - Prob. 17SPCh. 6 - Prob. 18SPCh. 6 - Prob. 19SPCh. 6 - Prob. 20SPCh. 6 - Prob. 21SPCh. 6 - Prob. 22SPCh. 6 - Prob. 23SPCh. 6 - Prob. 24SPCh. 6 - Prob. 25SPCh. 6 - Prob. 26SPCh. 6 - Prob. 27SPCh. 6 - Prob. 28SPCh. 6 - Prob. 29SPCh. 6 - Prob. 30SPCh. 6 - Prob. 31SPCh. 6 - Prob. 32SPCh. 6 - Prob. 33SPCh. 6 - Prob. 34SPCh. 6 - Prob. 35SPCh. 6 - Prob. 36SPCh. 6 - Prob. 37SPCh. 6 - Prob. 38SPCh. 6 - Prob. 39SPCh. 6 - Prob. 40SPCh. 6 - Prob. 41SPCh. 6 - Prob. 42SPCh. 6 - Prob. 43SPCh. 6 - Prob. 44SPCh. 6 - Prob. 45SPCh. 6 - Prob. 46SPCh. 6 - Prob. 47SPCh. 6 - Prob. 48SPCh. 6 - Prob. 49SPCh. 6 - Prob. 50SPCh. 6 - Prob. 51SPCh. 6 - Prob. 52SPCh. 6 - Prob. 53SPCh. 6 - Prob. 54SPCh. 6 - Prob. 55SPCh. 6 - Prob. 56SPCh. 6 - Prob. 57SPCh. 6 - Prob. 58SPCh. 6 - Prob. 59SPCh. 6 - Prob. 60SPCh. 6 - Prob. 61SPCh. 6 - Prob. 62SPCh. 6 - Prob. 63SPCh. 6 - Prob. 64SPCh. 6 - Prob. 65SPCh. 6 - Prob. 66SPCh. 6 - Prob. 67SPCh. 6 - Prob. 68SPCh. 6 - Prob. 69SPCh. 6 - Prob. 70SPCh. 6 - Prob. 71SPCh. 6 - Prob. 72SPCh. 6 - Prob. 73SPCh. 6 - Prob. 74SPCh. 6 - Prob. 75SPCh. 6 - Prob. 76SPCh. 6 - Prob. 77SPCh. 6 - Prob. 78SPCh. 6 - Prob. 79SPCh. 6 - Prob. 80SPCh. 6 - Prob. 81SPCh. 6 - Prob. 82SPCh. 6 - Prob. 83SPCh. 6 - Prob. 84SPCh. 6 - Prob. 85SPCh. 6 - Prob. 86SPCh. 6 - Prob. 87SPCh. 6 - Prob. 88SPCh. 6 - Prob. 89SPCh. 6 - 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