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15. 16. 17". 18. 19. 20. 21. 22. A one-sided limit can be used to determine the behaviour of a graph on either side of a A graph is .rr-a'_ if the left-hand limit equals the right-hand limit as The secant line between two points can be use to determine the The instantaneous rate of change is found using The limit of a function at x = a may exist even though the function is Mx=a When direct substitution of x = a into a limit results in - , the limit is said to be of an form. If the derivative does not exist at a point on the curve, the function is one or both sides . at that x -value. occurs when a lnction has a vertical asymptote on