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Let, the function f:RRrarrRR be defined ...

Let, the function `f:RRrarrRR` be defined by,
`f(x)={:{(1 ,"when " x in QQ),(-1,"when "x !in QQ):}" Find"`
`f(2),f(sqrt(2)),f(pi),f(2.23),f(e)`

Text Solution

Verified by Experts

The correct Answer is:
`f(2)=1,f(sqrt2)=-1,f(pi)=-1,f(2.23)=1,f(e)=-1`
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