JEE Mains · Maths · STD 12 - 1. relation and function
Let \(A=\{-3,-2,-1,0,1,2,3\),\(\} . Let R\) be a relation on A defined by \(x R y\) if and only if \(0 \leq x^2+2 y \leq 4\).
Let \(l\) be the number of elements in R and \(m\) be the minimum number of elements required to be added in R to make it a reflexive relation. then \(l+m\) is equal to
- A \(19\)
- B \(20\)
- C \(17\)
- D \(18\)
Answer & Solution
Correct Answer
(D) \(18\)
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & \mathrm{A}=\{-3,-2,-1,0,1,2,3\} \\ & -2 \mathrm{y} \leq \mathrm{x}^2 \leq 4-2 \mathrm{y}\end{aligned}\)…
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