CUET CUET Mathematics 2024 - Let R be the relation over the set A of all straight lines in a plane such that l_1 R l_2 l_1 is parallel to l_2. Then R is : | PYQs + Solutions | AfterBoards
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CUET Mathematics 2024

Algebra
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Relations & Functions

Easy

Let R be the relation over the set A of all straight lines in a plane such that l1Rl2⇔l1l_{1} \mathrm{R} l_{2} \Leftrightarrow l_{1} is parallel to l2l_{2}. Then R is :

Correct Option: 2
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CUET Mathematics 2024

If the function f:N→Nf: \mathbb{N} \rightarrow \mathbb{N} is defined as f(n)={n−1, if n is even n+1, if n is odd f(n)=\left\{\begin{array}{ll}n-1, & \text { if } n \text { is even } \\ n+1, & \text { if } n \text { is odd }\end{array}\right., then \newline (A) f is injective \newline (B) f is into \newline (C) f is surjective \newline (D) f is invertible

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