Limits, Can you help me find out this specific thing I dont know how to find out http://screencast.com/t/PUvesX4N

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Once you find f'(x), plug in a to get the slope of the line, m. Then you want to get it in the form y=mx+b, by using the fact it passes through the point (a, f(a))

Do you know how to take the derivative? If so, then first take the derivative of the function, then evaluate it at the given a -- this is "m", the slope of the tangent line. Now, evaluate the function at the given a. This we'll call "y1" The tangent line is: y-y1 = m (x-a)

Can please someone tell me what is a slope just so I get the bigger picture of whats going on?

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