Practice problem
Let fff be a function. Which of the following statements are necessarily true?
If f(x)=f(y)f(x) = f(y)f(x)=f(y), then x=yx = yx=y.
If x=yx = yx=y, then f(x)=f(y)f(x) = f(y)f(x)=f(y).
fff can take any number as an input.
When given a valid numerical input, fff will always return a number as its output.
Type a concept, like “slope” or “photosynthesis”.