21. Show that the function defined by f:Q Qffx)3x+5 for all xEQ is inv – InterviewSolution

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1.	21. Show that the function defined by f:Q Qffx)3x+5 for all xEQ is invertible.22. If /(x)--, then what is f1/{f(x)))?23. Let a function f:R R be defined by:f(x) 3-4x. Prove that'f' is one-one and onto24. If f(x)=-. then prove that f{f(x)2x+12x+12x+3
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