Practice problem
Which of the following functions have inverses?
f(x)=xf(x) = xf(x)=x
f(x)=x2f(x) = x^2f(x)=x2
f(x)=3x3−2x+1f(x) = 3x^3 - 2x + 1f(x)=3x3−2x+1
f(x)=3xf(x) = 3^xf(x)=3x
f(x)=5xf(x) = \frac{5}{x}f(x)=x5
Type a concept, like “slope” or “photosynthesis”.