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Find the area of the region included between: y2 = 4x, and y = x - Mathematics and Statistics

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प्रश्न

Find the area of the region included between: y2 = 4x, and y = x

बेरीज

उत्तर

The vertex of the parabola y2 = 4x is at the origin O = (0, 0).

Points of intersection of parabola and line are 

∴ x2 = 4x

x2 = 4x = 0

∴ x(x - 4) = 0

x = 0 or x = 4

∴ y = x

points are (0, 0) & (4, 4)

Area bounded by parabola and line is = Area (OABCO)

= A (OCBCO) - A (OCBAO)

`int_0^4 2sqrtx*dx - int_0^4x*dx`

= `2 [x^(3/2)/(3/2)]_0^4 - [x^2/2]_0^4`

= `2 xx 2/3 [(4)^(3/2) - (0)^(3/2)] - 1/2 [4^2 - 0^2]`

= `4/3[8 - 0]- 1/2 [16 - 0]`

= `32/3 - 8`

= `(32 - 24)/3`

Area = `8/3` square units.

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Area Bounded by the Curve, Axis and Line
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पाठ 5: Application of Definite Integration - Exercise 5.1 [पृष्ठ १८७]

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बालभारती Mathematics and Statistics 2 (Arts and Science) [English] 12 Standard HSC Maharashtra State Board
पाठ 5 Application of Definite Integration
Exercise 5.1 | Q 3.2 | पृष्ठ १८७

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