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Mathematics 11 Online
OpenStudy (anonymous):

Find dy/dx by implicit differentiation. 5x^3+x^2y−xy^3=3

zepdrix (zepdrix):

Mmmm ok. What part are you having trouble with? First term is ok, yes? Those y's confusing you?

OpenStudy (anonymous):

i got the derivative to be \[15x^2+2xy+x^2y'-y^3+xy^3y'\]is that right?

OpenStudy (anonymous):

15x^2+2xy+x^2y'-y^3+xy^3y'=0

zepdrix (zepdrix):

Everything looks good except the last term. When you did your product rule, you made a couple of small mistakes. ~Distribute the negative sign from the original -xy^3 ~Taking the derivative of the y^3 shouldn't give you y^3y'

OpenStudy (anonymous):

yeah i was just gonna say that it should be -x3y^2y'

OpenStudy (anonymous):

(-x)(3y^2)(y')

zepdrix (zepdrix):

ya looks good! :)

OpenStudy (anonymous):

ok i think i got it. one sec

OpenStudy (anonymous):

nope i dont have it

OpenStudy (anonymous):

WAIT WAIT WAIT!!!!!!!!!!! I GOT IT. NEVER MIND. THANKS FOR THE HELP!!!!!!

zepdrix (zepdrix):

haha :) gj

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