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### Professor Strang Introduces the Series

00:04:57Gilbert StrangProfessor Gilbert Strang talks informally in his office at MIT about why he created this video series, and how MIT OpenCourseWare users can benefit from these materials.

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### Big Picture of Calculus

00:37:47Gilbert StrangCalculus is about change. One function tells how quickly another function is changing. Professor Strang shows how calculus applies to ordinary life situations, such as driving a car, climbing a mountain, and growing to full adult height.

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### Big Picture: Derivatives

00:30:05Gilbert StrangCalculus finds the relationship between the distance traveled and the speed — easy for constant speed, not so easy for changing speed. Professor Strang is finding the rate of change, the slope of a curve, and the derivative of a function.

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### Max and Min and Second Derivatives

00:38:31Gilbert StrangAt the top and bottom of a curve (Max and Min), the slope is zero. The second derivative shows whether the curve is bending down or up. Here is a real-world example of a minimum problem: What route from home to work takes the shortest time?

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### The Exponential Function

00:38:54Gilbert StrangProfessor Strang explains how the magic number e connects to ordinary things like the interest on a bank account. The graph of y = e^x has the special property that its slope equals its height (it goes up exponentially fast!). This is the great function of calculus.

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### Big Picture: Integrals

00:37:22Gilbert StrangThe second half of calculus looks for the distance traveled even when the speed is changing. Finding this integral is the opposite of finding the derivative. Professor Strang explains how the integral adds up little pieces to recover the total distance.

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