Question: If r is a rational function, use Exercise 57 to show that lim x a r(x) r(a) for every number a in the

If r is a rational function, use Exercise 57 to show that limx → a r(x) − r(a) for every number a in the domain of r.


Exercise 57

If p is a polynomial, show that limx → a  p(x) − p(a).

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