If Q = left{ {x:x = {1 over y},,{rm{where ,,}}y ∈ N} right} , then

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1.Set Theory

easy

If $Q = \left\{ {x:x = {1 \over y},\,{\rm{where \,\,}}y \in N} \right\}$, then

A

$0 \in Q$

B

$1 \in Q$

C

$2 \in Q$

D

${2 \over 3} \in Q$

Solution

(b) ${1 \over y} \neq 0,{1 \over y} \neq 2,{1 \over y} \neq {-2 \over 3}, [y \in N]$

${1 \over y}$ can be $1, [ y\ can\ be\ 1].$

Standard 11

Mathematics

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