Practice problem
Which of the following equations are examples of cubic functions?
f(x)=−x2−14f(x)=-x^{2} -14f(x)=−x2−14
f(x)=5x2−25x3f(x)=5x^{2} -\frac{2}{5}x^{3}f(x)=5x2−52x3
f(x)=5x2−ex⋅x2f(x)=5x^{2} -e^{x}\cdot{x^{2}}f(x)=5x2−ex⋅x2
f(x)=5x3−xexf(x)=5x^{3} -xe^{x}f(x)=5x3−xex
Type a concept, like “slope” or “photosynthesis”.