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Let RR and QQ be the set of real numbers...

Let `RR and QQ` be the set of real numbers and rational numbers respectively and `f:RR to RR` be defined as follows:
`f(x)={:{(5",", "when "x in QQ),(-5","," when " x !in QQ):}`
Find `f(3),f(sqrt(3)),f(3.6),f(pi),f(e) and f(3.36),`

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