Sigma Percentile
JEE Advanced 2002
LEVELJEE Advanced

Animated Solution for Mathematics - Definite Integration: Find the area of the region bounded by the curves and , which lies to the right of the line .

Visualized Solution

Visualizing the Curves

  • Given curves: , , and .
  • Constraint: The region must be to the right of .
  • Identify the boundaries on the graph: Blue (), Green (), and Red ().

Handling the Modulus Function

  • The modulus function changes behavior at , i.e., .
  • For : .
  • For : .

Finding Intersection Points

  • Intersection of and : (since ).
  • Intersection of and : .
  • Intersection of and : .

Identifying the Region

  • The region is split into two intervals: and .
  • Interval 1: Upper curve is , Lower curve is .
  • Interval 2: Upper curve is , Lower curve is .

Setting up the Integral

  • Area =
  • Area =

Simplifying Integrands

  • Simplify the integrands before integrating.
  • First integral:
  • Second integral:
  • Area =

Integrating the First Part

  • Substitute limits:
  • Simplify:

Integrating the Second Part

  • Substitute limits:
  • Simplify:

Final Calculation

  • Total Area =
  • Area =
  • Area =
  • Final Result: sq. units.

The Sigma Insight: Area Bounded by Curves

Solution Diagram

Analyzing the Setup

To find the area trapped by the curves , , and for , we must first understand the behavior of the modulus function .
The function is defined piecewise: For (i.e., ), . For (i.e., ), .
The critical transition point occurs at .

Defining the Regions

We are restricted to the region where . By analyzing the intersections, we identify two distinct intervals for integration:
1. Region 1 (): The parabola acts as the upper boundary, and the modulus curve acts as the lower boundary. 2. Region 2 (): The horizontal line acts as the upper boundary, and the modulus curve acts as the lower boundary.

The Master Equation

The total area is the sum of the integrals over these two regions:
Simplifying the integrands, we obtain:

Final Calculation

Now, we perform the integration for each part:
For the first integral:
For the second integral:
Summing these two results together:
The final area is square units.

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