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A derivative is simply a rate of change. Whether you're modeling the movement of a particle or a supply/demand model, this is a key instrument of Calculus.
Let \[f(x) = x^3 + x^2 + x + 1.\]
What is the value of \(f'(1)?\)
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Let \(n\) be a real number and \[f(x) = x^n + x^{-n}.\]
What is the value of \(f'(1)?\)
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Cameron is out running for an hour. His distance (in kilometers) from home \(t\) hours after leaving is given by the formula \[s(t) = 12(t - t^2),\text{ for } 0 \leq t \leq 1.\]
His average velocity for the hour-long run is 0 km./h., since
\[\frac{s(1) - s(0)}{1-0} = \frac{0-0}{1-0} = 0.\]
What is Cameron's average velocity (in km./h.) during the first half-hour of his trip?
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True or False?
For every quadratic function \(f(x) = ax^2 + bx + c,\) there is a real number \(x\) such that \[f(x)=f'(x).\]
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True or False?
If \(n\) is an odd integer and \(f(x) = x^n,\) then \(f'(x)\) is an even function, i.e. \(f'(x) = f'(-x).\)
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