Limit Definition of Derivative, Rational Function Example

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6 years later and this video is still helping students. thank you Patrick

Breena
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27th December 2023
Thank you Sir Patrick For all Your Videos!

aSeekerSoul
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Great Vid. Really helped me out.

Also it is great to see another left hander.

josiahshepherd
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Very clear step by step directions and explanation. video was well made!

basketballcutie
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I have a cumulative final coming up so i decided to go back and review some staff and gosh everything becomes so simply as you advance and learn new techniques. Specially this derivative stuff, you'll know what am talking about later on.

RJ-hwmf
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Derivatives make a ton more sense after watching this tutorial. Thank you!

chadadler
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Loved it! Made so much sense unlike other videos

berrybeebee
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I really like they way you explain things. thanks so much

taal
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Thank you so much, you just helped me finish my calc hw lol

kapnkai
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Thanks for the review; you've made it so much more appreciable!

AmenIamHotepRA
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This really helped me out a lot! It looks easy now

Xmegan
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Thanks for showing this, I hope I can remember it for my final later today =)

AandW
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Does it make a difference if I multiply 4x(x+h) in the beginning or it will be alot more difficult to do so?

TheMaxinoob
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How about if its like this (square root of x) - 1/(square root of x) - 1

jpvarias
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my school teaches delta x instead of H. makes it more confusing and long. have to follow the 3 steps

ieYeZonYoUi
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I know this is a bit of a dumb question, but what if f(x) is not a rational function? One of the steps that you used to solve this equation involved finding a common denominator. So what about function where you can’t use those?

theyammi
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hm.. You can apply the short cut rule such as the "quotient rule" to this can't you? I use the short cut and got the same answer. Whats the point of knowing the true definition of the Derivative if you got the short cut rules? When can I apply this again if short cut rules are out of the option?

nipongvaj
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I think he multiplied the denominator wrong lol

didllynutz
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wait you said 3x and -3x cancel Where did you get -3 for -3h?

brittherold
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you got this problem wrong! its -12/(4x)^2

dandindejesus