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The linear inequalities satisfying the shaded feasible region given in the figure are

Figure for CUET Mathematics 2025 30 May Shift 2 question 37 (Algebra)

(A) x0x \geq 0, y0y \geq 0, 2x+y22x + y \geq 2

(B) x0x \geq 0, y0y \geq 0, 2x+y22x + y \leq 2

(C) x0x \geq 0, y0y \geq 0, 2x+y22x + y \geq 2, x+2y8x + 2y \leq 8, xy1x - y \leq 1

(D) x+2y8x + 2y \geq 8, xy1x - y \geq 1

Choose the correct answer from the options given below:

Solution

Correct Option: 1

The feasible region shown in the graph needs to be described by a set of linear inequalities.


From the graph, the region is in the first quadrant:

x0x \geq 0 and y0y \geq 0


The boundary lines forming the shaded region are:

Line passing through (1,0)(1, 0) and (0,2)(0, 2) has equation 2x+y=22x + y = 2

At (1,0)(1, 0): 2(1)+0=22(1) + 0 = 2

The shaded region is above this line: 2x+y22x + y \geq 2


Another boundary line has equation x+2y=8x + 2y = 8

The region is below this line: x+2y8x + 2y \leq 8


Another boundary line has equation xy=1x - y = 1

The region is below this line: xy1x - y \leq 1


Option (A): x0x \geq 0, y0y \geq 0, 2x+y22x + y \geq 2

This describes an unbounded region in the first quadrant above the line 2x+y=22x + y = 2. The shaded region is part of this larger region. This is correct.


Option (B): x0x \geq 0, y0y \geq 0, 2x+y22x + y \leq 2

This describes a region below the line 2x+y=22x + y = 2, but the shaded region is above this line. This is incorrect.


Option (C): x0x \geq 0, y0y \geq 0, 2x+y22x + y \geq 2, x+2y8x + 2y \leq 8, xy1x - y \leq 1

This describes the exact bounded region with all five constraints matching the shaded region perfectly. This is correct.


Option (D): x+2y8x + 2y \geq 8, xy1x - y \geq 1

This is missing x0x \geq 0, y0y \geq 0 and has wrong inequality directions. This is incorrect.


Option (C) gives the complete description of the exact bounded region, while Option (A) gives a partial description of a larger region that contains the shaded area. Both describe inequalities satisfied by the shaded region.

The answer is (A) and (C) only.

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