Question: Find if the given expression is a function, if so is it injective or subjective or bijective. 2. f:RZ,f(x)=1x 3. f:ZR+,f(x)=x+2. 4. f:RR,f(x)=x2x2. 5. f:NR+,f(x)=(x1)2

Find if the given expression is a function, if so is
it injective or subjective or bijective. 2. f:RZ,f(x)=1x 3. f:ZR+,f(x)=x+2. 4. f:RR,f(x)=x2x2.

Find if the given expression is a function, if so is it injective or subjective or bijective. 2. f:RZ,f(x)=1x 3. f:ZR+,f(x)=x+2. 4. f:RR,f(x)=x2x2. 5. f:NR+,f(x)=(x1)2

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