Chain Rule (1 of 3: Introducing a substitution)

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Love your enthusiasm and energy. Math needs people just like you to continue this important discipline.

FiftiesDad
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Brilliant tip at 3.51 minutes, where Eddie tells us exactly WHY a simple number in a function doesn't affect the gradient. I've done many derivatives before in questions, but only now do I understand why simple numbers disappear (in a "concrete" sense as opposed to it just being because of the way the "power" attached to any simple number being x to the nought)

helenday
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first teacher that has ever explained to me WHY derivative of a constant is 0.

mattk
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Kudos for using the U-substitution method for the chain rule, rather than the messy form f(g(x)) = f'(g(x))*g'(x) . I find U-substitution to be much easier to remember, plus it ties in better when you start doing the "Reverse Chain Rule" for integrals.

KarlBonner
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hey gr8 video!
is this a methods 1&2 class?

shimipaca
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1:11 someone sneezes and the professor says "bless you" and then moves on... no quarantine internment, no masks, no police asking for medical papers...ah, 2017 what a time to be alive.

commandofaku
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Get more on chain rule from this link:

OninabResources