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Need solution for RD Sharma maths Class 12 Chapter 29 Linear Programming Exercise Multiple Choice Question Question 12 textbook solution.

Answers (1)

Answer : (c)

\{x:|x|=5\}

Hint:

Convex set is a set in which all points joining the line segment lies inside the set

Given:

a) \begin{aligned} &\{(x, y): 2 x+5 y<7\} \\ \end{aligned}

b) \begin{aligned} &\left\{(x, y): x^{2}+y^{2} \leq 4\right\} \\ \end{aligned}

c) \begin{aligned} &\{x:|x|=5\} \\ \end{aligned}

d) \begin{aligned} &\left\{(x, y): 3 x^{2}+2 y^{2} \leq 6\right\} \end{aligned}

Solution :

\left | x \right |=5is not a convex set as any two points from negative and positive x-axis, if are joined will not lie in the set.

Since, option (a), (b) and (d) is a convex set and option (c) is not a convex set. So, the correct option is (c).

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