Question: 6. For a certain function f (x) it is known that f(x + h) - f(x) simplifies to: f ( x + h) - f(xx)


6. For a certain function f (x) it is known that f(x + h) - f(x) simplifies to: f ( x + h) - f(xx) =3x2h+3xh2+h3-3h (a) Find f'(x) using the limit definition of derivative. (b) Determine the average rate of change of f (x) over the interval [1, 3]
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