Practice problem
Which of the following are exponential functions?
f(x)=(2e)xf(x) = (2e)^xf(x)=(2e)x
f(x)=2x+2xf(x) = 2x + 2^xf(x)=2x+2x
f(x)=2−xf(x) = 2^{-x}f(x)=2−x
f(x)=8⋅2xf(x) = 8 \cdot 2^xf(x)=8⋅2x
f(x)=xxf(x) = x^xf(x)=xx
f(x)=xef(x) = x^ef(x)=xe
Type a concept, like “slope” or “photosynthesis”.