First, we need to determine the intercepting points of the
given curves. These points will represent the necessary limits of
integration.
Since y = x^3 and y = `sqrt(x)` , we'll equate
and we'll get:
x^3 =
`sqrt(x)`
We'll raise to square both sides to remove the
square root:
x^6 = x
We'll
move the terms in x to the left:
x^6 - x =
0
We'll factorize by x:
x(x^5
- 1) = 0
x1 = 0 and x2 = 1
The
lower limit of integration is x = 0 and the upper limit is x =
1.
Since the graph of the function `sqrt(x)` is above the
graph of the function x^3, over the interval [0;1], we'll determine the area evaluating
the definite integral of the difference `sqrt(x)` -
x^3.
1 1
1
`int` `sqrt(x)` - x^3 dx = `int` `sqrt(x)` dx - `int`
x^3dx
0 0
0
1
`int` ` ` - x^3 dx =
[2x^(3/2)]/3 (0 -> 1) - x^4/4
(0->1)
0
We'll apply
Leibniz Newton
formula:
1
`int` ` ` - x^3 dx
= 2/3 -
1/4
0
1
`int`
` ` - x^3 dx = (8 -
3)/12
0
1
`int`
` ` - x^3 dx =
5/12
0
The area
of the region bounded by y = x^3 and y = `sqrt(x)` is A = 5/12 square
units.
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