Practice problem
Which of the following functions have function inverses?
f(x)=x3+x2f(x) = x^3 + x^2f(x)=x3+x2
f(x)=3xf(x) = 3^xf(x)=3x
f(x)=2.7f(x) = 2.7f(x)=2.7
f(x)=sin(x)f(x) = \text{sin}(x)f(x)=sin(x)
f(x)=11+2−xf(x) = \frac{1}{1 + 2^{-x}}f(x)=1+2−x1
Type a concept, like “slope” or “photosynthesis”.