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FrankB

  • 2 years ago

About Session 9, Clip 3 on product rule. At about 6 min. 8 sec into the video, the professor says that he introduced u(v(x+∆x) which he didn't like. However, the formula until then reads (u(x+∆x)-u(x))v(x+∆x), so the u in u(v(x+∆x) doesn't concern v(x+∆x) but belongs to (u(x+∆x)-u(x)) as is indicated by the brackets. He later introduced +u(x)v(x+∆x) to cancel for something that actually was not there in the first place. Although it ends up as it should, I cannot follow the explantion provided. The explanation in the lecture notes seems more logical. Did I miss something?

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  1. Stacey
    • 2 years ago
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    Can you give a website address?

  2. FrankB
    • 2 years ago
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    Dear Stacey, Sorry it took a few days. The address is http://ocw.mit.edu/courses/mathematics/18-01sc-single-variable-calculus-fall-2010/part-a-definition-and-basic-rules/session-9-product-rule/ from the course 18-01sc single variable calculus with kind regards Frank

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