The "notational second derivative" is true only when the function 𝑓(𝑥) is of a very specific form 
pic.twitter.com/ZFTgHFcqxp
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You accept it they are not equal... oh my god we have a “non-caveman” physicist
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Alright, lets start from preliminaries. EXPONENTS DOES NOT MEAN THE ORDER
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I’ll remember to tell my diff eq class this fall.
End of conversation
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