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.

Which portion of the ski lift is the steepest?

If \(|f(x_1)-f(x_2)|=(x_1-x_2)^2\), then find the tangent to \(y=f(x)\) at \((2,5)\).

If the tangent can be represented as \(y=mx+c\), find the value of \(m+c\).

\[ \large y_n (x) = e^x \times e^{x^2} \times e^{x^3} \times \ldots \times e^{x^n} \]

For some positive integer \(n\), let \(y_n(x) \) denote function of \(x\) as stated above.

What is the value of the limit below?

\[ \large \lim_{n\to\infty} \left . \frac d{dx} \left ( y_n (x) \right ) \right |_{x=\frac12} \]

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