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Application of Integrals

JEE Main 2026 (Online) 21st January Evening ShiftMCQMedium📈 Topic in 72% papers+4−1
Ques. 1JEE Main 2026, 21 January (Evening Shift)

If the area of the region \(x, y) : 1 - 2x y 4 - x2, x 0, y 0\ is , , N, ( , ) = 1, then the value of ( + ) is:

  1. 73
  2. 85
  3. 67
  4. 91

Answer

(1) 73

Solution

The upper boundary y = 4 - x2 meets y = 0 at x = 2 (for x 0), and 1 - 2x 4 - x2 (x - 3)(x + 1) 0, which is true for all x [0, 2].

The lower boundary is y = 1 - 2x for 0 x 12 and y = 0 for 12 x 2, so

Area = 02 (4 - x2) dx - 01/2 (1 - 2x) dx

= (8 - 83 ) - ( 12 - 14 )

= 163 - 14 = 6112

Hence = 61, = 12.

+ = 73

Answer: (1)

Keep practising — Application of Integrals

Ques. 2JEE Main 2025, 8 April (Evening Shift)

Let the area of the bounded region \(x, y) : 0 9x y2, y 3x - 6 \ be A. Then 6A is equal to .

Ques. 3JEE Main 2025, 7 April (Morning Shift)

If the area of the region bounded by the curves y = 4 - x24 and y = x-42 is equal to , then 6 equals

  1. 210
  2. 250
  3. 240
  4. 220
Ques. 4JEE Main 2025, 7 April (Evening Shift)

If the area of the region \(x, y) : 1 + x2 y \x + 7, 11 - 3x\\ is A, then 3A is equal to :

  1. 50
  2. 46
  3. 49
  4. 47
Ques. 5JEE Main 2025, 4 April (Morning Shift)

If the area of the region \(x, y) : |x - 5| y 4 x\ is A, then 3A is equal to .

Ques. 6JEE Main 2025, 4 April (Evening Shift)

A line passing through the point A(-2, 0) touches the parabola P: y2 = x - 2 at the point B in the first quadrant. The area of the region bounded by the line AB, parabola P and the x-axis, is :

  1. 3
  2. 73
  3. 83
  4. 2
Ques. 7JEE Main 2025, 3 April (Morning Shift)

The area of the region bounded by the curve y = \|x|, x|x-2|\, the x-axis and the lines x = -2 and x = 4 is equal to

Ques. 8JEE Main 2025, 3 April (Evening Shift)

The area of the region \(x, y) : |x - y| y 4 x\ is

  1. 5123
  2. 20483
  3. 512
  4. 10243
Ques. 9JEE Main 2025, 2 April (Morning Shift)

If the area of the region \(x, y) : |4 - x2 | y x2, y 4, x 0 \ is ( 80 2 - ), , N, then + is equal to .

Ques. 10JEE Main 2025, 29 January (Morning Shift)

Let the area of the region \(x, y) : 2y x2 + 3, y + |x| 3, y |x - 1|\ be A. Then 6A is equal to :

  1. 14
  2. 18
  3. 16
  4. 12
Ques. 11JEE Main 2025, 29 January (Evening Shift)

Let the area enclosed between the curves |y|=1-x2 and x2+y2=1 be . If 9 = + ; , are integers, then the value of | - | equals:

  1. 15
  2. 18
  3. 33
  4. 27

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