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Is this the correct approach? If not, a breakdown of the steps needed would be greatly appreciated I need to prove if the following function
Is this the correct approach?
If not, a breakdown of the steps needed would be greatly appreciated
I need to prove if the following function is a bijection or is not a bijection
f: R-->R, where f(x)= -2x+1
let a,b be an element of R and let f(a)=f(b)
therefore -2a+1=-2b+1
therefore -2a=-2b
therefore a=b
therefore a=b
let y be an element of R and let f(x)=y
therefore -2x+1=y
therefore x= y-1/-2
therefore x= element of R
Guessing this is wrong....
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