Practice problem
Which of the following are rational expressions?
f(x)=x2+5x+32x+5f(x) = \frac{x^2 + 5x + 3}{2x + 5}f(x)=2x+5x2+5x+3
f(x)=x5+2x8x2f(x) = \frac{x^5 + 2^x}{8x^2}f(x)=8x2x5+2x
f(x)=2xf(x) = \frac{2}{x}f(x)=x2
f(x)=3x2+5x+2f(x) = 3x^2 + 5x + 2f(x)=3x2+5x+2
f(x)=xln(x)f(x) = \frac{x}{\ln(x)}f(x)=ln(x)x
Type a concept, like “slope” or “photosynthesis”.