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Mathematics 31 Online
OpenStudy (anonymous):

i dont understand the use of differentials.. y=x^3 -3sqrootx dy=f'(x)dx dy=(3x^2)-(3*(1/(2sqrootx))dx its just differentiation and then putting dx..

OpenStudy (anonymous):

Do you know about Leibniz notation for derivatives?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

\[ f'(x) = \frac{dy}{dx} \\ \therefore \ dy=f'(x)dx\]

OpenStudy (anonymous):

isnt that obvious? why give it a section in a textbook

OpenStudy (anonymous):

Hehe, I don't know, Math books can be like that, depending on the subject and author, but yes, it's a regular derivative. Maybe they just want to empathize that you can use algebraic methods for manipulation with the Leibniz notation too, unlike the Lagrange Notation where you are a bit more limited.

OpenStudy (anonymous):

ahh i see ty

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