MCQ
Let $n$ be a fixed positive integer. Define a relation $R$ on the set $Z$ of integers by, $aRb \Leftrightarrow n|a - b$|. Then $R$ is
- AReflexive
- BSymmetric
- CTransitive
- ✓All of the above
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$(1)$ F has a local minimum at $x=1$
$(2)$ $F$ has a local maximum at $x=2$
$(3)$ $F ( x ) \neq 0$ for all $x \in(0,5)$
$(4)$ F has two local maxima and one local minimum in $(0, \infty)$