Question:

Find the area of the region bounded by the curve y2=x and the lines x=1,x=4 and the x-axis

Updated On: Sep 21, 2023
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Solution and Explanation

 

y^2=x, x=4

The area of the region bounded by the curve y2= x, the lines, x=1 and x = 4,and the x-axis is the area ABCD.

Area of ABCD =\(\int^4_1ydx\)

=\(\int^4_1\sqrt xdx\)

=\(\bigg[\frac{x^{\frac{3}{2}}}{\frac{3}{2}}\bigg]\)

=\(\frac{2}{3}\bigg[(4)^{\frac{3}{2}}-(1)^{\frac{3}{2}}\bigg]\)

=\(\frac{2}{3}\)[8-1]

=\(\frac{14}{3}\) units

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Concepts Used:

Integral

The representation of the area of a region under a curve is called to be as integral. The actual value of an integral can be acquired (approximately) by drawing rectangles.

  • The definite integral of a function can be shown as the area of the region bounded by its graph of the given function between two points in the line.
  • The area of a region is found by splitting it into thin vertical rectangles and applying the lower and the upper limits, the area of the region is summarized.
  • An integral of a function over an interval on which the integral is described.

Also, F(x) is known to be a Newton-Leibnitz integral or antiderivative or primitive of a function f(x) on an interval I.

F'(x) = f(x)

For every value of x = I.

Types of Integrals:

Integral calculus helps to resolve two major types of problems:

  1. The problem of getting a function if its derivative is given.
  2. The problem of getting the area bounded by the graph of a function under given situations.