I want to show f(x) =x/(x+2) is injective.
I know I need to assume a is not equal to a' but f(a)=f(a') and find contradiction.
Here is my start:
Assume a not equal to a'.
f(a)=a/(a+2)
f(a')=a'/(a'+2)
Now I'm not sure where to go with this?
I want to show f(x) =x/(x+2) is injective.
I know I need to assume a is not equal to a' but f(a)=f(a') and find contradiction.
Here is my start:
Assume a not equal to a'.
f(a)=a/(a+2)
f(a')=a'/(a'+2)
Now I'm not sure where to go with this?