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Mistake Master · AP Precalculus · Unit 1 · Step-Through Animation

One Fraction Decides Both Ends

You'll learnto find a rational function's end behavior by comparing the degrees of its top and bottom.

Far from zero a polynomial behaves like its leading term, so a fraction made of two polynomials behaves like a fraction made of two leading terms. Compare those two degrees and every question about the ends is answered. Eleven short steps; press Next for each one.

11 STEPS · 6 QUICK CHECKS · LEADING-TERM RATIO · THREE CASES · SLANT · CROSSING IS LEGAL · v3

end behavior = leading term ÷ leading term
Before you start
What you're looking at
A fraction of two polynomials, worked out at large inputs and then plotted with the line its ends settle on.
The question
For large inputs, which grows faster: the top, the bottom, or neither?
Step 1 / 11