pre-cal one to one functions?

undiscovered

New member
Which of the following functions are one-to-one? why or why not?

a.) f(x)= square root 3-x

b.) f(x)= 2x-4

c.) f(x)= x^9 - 8

d.) f(x)= x^6 - 1

e.) f(x)= {x^4 , x-2 if x > or = to 0 & if x < 0


I appreciate the help so I can understand this stuff.
 
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