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Limits That Fail to Exist In Exercises 21 and 22, create a table of values for the function and use the result to explain why the limit does not exist. 4 21. lim 22. lim 1401 + el/x 140 72 Finding a Limit Graphically In Exercises 23-30, use the graph to find the limit (if it exists). If the limit does not exist, explain why. 23. lim (4 - x) 24. lim sec x NPI + - - 25. lim f(x) 26. lim f(x) r-+2 f (x) = 17 4- x, x#2 f ( x ) = x+3, x#1 lo. x =2 2. x=1 2 - x 2