Question:

The area of the region bounded by the line $y = 2x + 1$, $x $ - axis and the ordinates $x = -1$ and $x = 1$ is

Updated On: May 11, 2024
  • $\frac{9}{4}$
  • $2$
  • $\frac{5}{2}$
  • $5$
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The Correct Option is C

Solution and Explanation

Area bounded by $y = 2x+1$ with $x$- axis
$= (1/2) (1/2)(1) +(1/2) (3/2)(3) $
$= 5/2$ s units.
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Concepts Used:

Area under Simple Curves

  • The area of the region bounded by the curve y = f (x), x-axis and the lines x = a and x = b (b > a) - given by the formula:
\[\text{Area}=\int_a^bydx=\int_a^bf(x)dx\]
  • The area of the region bounded by the curve x = φ (y), y-axis and the lines y = c, y = d - given by the formula:
\[\text{Area}=\int_c^dxdy=\int_c^d\phi(y)dy\]

Read More: Area under the curve formula