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Which of the following regions will represent the shaded area in the given figure ?Figure for CUET Mathematics 2023 30 May Shift 3 question 49 (Calculus)

Solution

✅ Correct Option: 1

1. Identify the Core Equations from the Figure:

  • The Parabola: The label says y 5 x^2 1 2, which translates to the quadratic curve: y=x2+2y = x^2 + 2 (with its vertex at (0,2)(0,2)).
  • The Straight Line: The label reads y 5 2x 1 2, which translates to the linear equation: y=2x+2y = 2x + 2.
  • Vertical Boundary Lines: There are two vertical lines drawn at x 5 2 and x 5 3, meaning x=2x = 2 and x=3x = 3.

2. Analyze the Shaded Region:

Let's look at where the shaded area lies relative to each boundary:

  1. With respect to the X-axis (y=0y = 0): The shaded region lies entirely above the x-axis, meaning y≥0y \geq 0.
  2. With respect to the Parabola (y=x2+2y = x^2 + 2): The shaded area lies below the curve of the parabola for its entire span. Therefore, the inequality must be y≤x2+2y \leq x^2 + 2.
  3. With respect to the Line (y=2x+2y = 2x + 2): The shaded area lies below the straight line. Therefore, the inequality must be y≤2x+2y \leq 2x + 2.
  4. With respect to the X-interval: The region starts at the y-axis (x=0x = 0) and extends all the way to the final vertical line boundary at x=3x = 3. This means 0≤x≤30 \leq x \leq 3.

Conclusion:

Combining all these boundaries, the system of inequalities that represents the shaded region is:

{(x,y):0≤y≤x2+2, 0≤y≤2x+2, 0≤x≤3}\{(x,y) : 0 \le y \le x^2+2, \ 0 \le y \le 2x+2, \ 0 \le x \le 3\}

This corresponds exactly to Option 1.

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