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Match List-I with List-II

List-IList-II
(Inequality)(Solution Set)
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(A) 2x3<x+23x+5,xR2x - 3 < x + 2 \le 3x + 5, x \in \mathbb{R}(I) x(1,)x \in (-1, \infty)
(B) 2x+3<7,xR\vert 2x + 3\vert < 7, x \in \mathbb{R}(II) x(,120]x \in (-\infty, 120]
(C) 12(35x+4)13(x6),xR\frac{1}{2}\left(\frac{3}{5}x + 4\right) \ge \frac{1}{3}(x - 6), x \in \mathbb{R}(III) x(5,2)x \in (-5, 2)
(D) x+1x+1>0,xR{1}\frac{\vert x + 1\vert }{x + 1} > 0, x \in \mathbb{R} - \{-1\}(IV) x[32,5)x \in \left[-\frac{3}{2}, 5\right)

Choose the correct answer from the options given below:

Solution

Correct Option: 4

Splitting 2x3<x+23x+52x - 3 < x + 2 \leq 3x + 5 into two parts:

2x3<x+22x - 3 < x + 2

x<5x < 5

 

x+23x+5x + 2 \leq 3x + 5

2x3-2x \leq 3

x32x \geq -\dfrac{3}{2}

Both must hold simultaneously:

x[32, 5)x \in \left[-\dfrac{3}{2},\ 5\right) \Rightarrow (IV)


Using A<k    k<A<k|A| < k \implies -k < A < k:

2x+3<7|2x + 3| < 7

7<2x+3<7-7 < 2x + 3 < 7

10<2x<4-10 < 2x < 4

5<x<2-5 < x < 2

x(5, 2)x \in (-5,\ 2) \Rightarrow (III)


12(35x+4)13(x6)\dfrac{1}{2}\left(\dfrac{3}{5}x + 4\right) \ge \dfrac{1}{3}(x - 6)

Clearing fractions by multiplying by 66:

3(35x+4)2(x6)3\left(\dfrac{3}{5}x + 4\right) \ge 2(x - 6)

95x+122x12\dfrac{9}{5}x + 12 \ge 2x - 12

Multiplying by 55:

9x+6010x609x + 60 \ge 10x - 60

120x120 \ge x

x(, 120]x \in (-\infty,\ 120] \Rightarrow (II)


x+1x+1>0\dfrac{|x+1|}{x+1} > 0, where x1x \neq -1

Since x+1>0|x+1| > 0 always, the sign depends entirely on the denominator.

The fraction is positive only when x+1>0x + 1 > 0, i.e. x>1x > -1.

x(1, )x \in (-1,\ \infty) \Rightarrow (I)


List-IList-II
(A)(IV)
(B)(III)
(C)(II)
(D)(I)

Therefore, the correct answer is (A)-(IV), (B)-(III), (C)-(II), (D)-(I).

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