Linear InequalitiesMCQMTP Nov 19Question 1144 of 146
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The solution set of the inequation x+2>0\displaystyle x+2 > 0 and 2x6>0\displaystyle 2x-6 > 0 is

Options

A(2,)\displaystyle (-2, \infty)
B(3,)\displaystyle (3, \infty)
C(,2)\displaystyle (- \infty, 2)
D(,3)\displaystyle (- \infty, 3)
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Correct Answer

Option b(3,)\displaystyle (3, \infty)

All Options:

  • A(2,)\displaystyle (-2, \infty)
  • B(3,)\displaystyle (3, \infty)
  • C(,2)\displaystyle (- \infty, 2)
  • D(,3)\displaystyle (- \infty, 3)

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Detailed Solution & Explanation

Let's solve the two inequalities to find the common solution set:

1) First inequality:
x+2>0    x>2x + 2 > 0 \implies x > -2
This corresponds to x(2,)\displaystyle x \in (-2, \infty).

2) Second inequality:
2x6>0    2x>6    x>32x - 6 > 0 \implies 2x > 6 \implies x > 3
This corresponds to x(3,)\displaystyle x \in (3, \infty).

To satisfy both inequalities, we find the intersection of the two solution sets:
Solution Set=(2,)(3,)=(3,)\text{Solution Set} = (-2, \infty) \cap (3, \infty) = (3, \infty){xRx>3}\{x \in \mathbb{R} \mid x > 3\}
In interval notation, this is (3,)\displaystyle (3, \infty).

This matches Option B perfectly.

Hence, **Option B** is the correct answer.

About This Chapter: Linear Inequalities

Paper

Paper 3: Quantitative Aptitude

Weightage

1-3 Marks

Key Topics

Linear Inequalities in one & two variables

This chapter covers Linear Inequalities in one & two variables and is part of Paper 3: Quantitative Aptitude in the CA Foundation exam.

View Official ICAI Syllabus

Exam Strategy Tip

This topic carries 1-3 Marks weightage. Focus on understanding core concepts rather than memorizing.

Key Concepts to Understand

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