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Mathematics 10 Online
OpenStudy (anonymous):

implicit differentiation help. Somebody here has got to know how to do this problem... >.< nobody has been able to get it thus far. :| http://gyazo.com/53dfb49c3ca8d1a3b949b4f9f2afa67c

OpenStudy (cruffo):

wow, talk about issuing a challenge :)

OpenStudy (anonymous):

._.

OpenStudy (cruffo):

where have you gotten so for

OpenStudy (anonymous):

i've solved for dy/dx. plugged the x and y coordinates in and got -1.732. so that should be my slope for the tangent line. i plug in values to y-y1=m(x-x1). which would be y-1=-1.732(x+3sqrt3)

OpenStudy (anonymous):

but when i set that equal to y, i dont get the right answer for some reason. doing something wrong

OpenStudy (anonymous):

goku!! :)

hartnn (hartnn):

hi :)

OpenStudy (cruffo):

checking it now

OpenStudy (anonymous):

\[\frac{2}{3}x^{-\frac{1}{3}}+\frac{2}{3}y^{-\frac{1}{3}}y'=0\]is a start

OpenStudy (cruffo):

I got \(\large y' = \frac{\sqrt{3}}{3}\)

OpenStudy (anonymous):

ye. got that far.

OpenStudy (cruffo):

\(\large y-1 = \frac{\sqrt{3}}{3}(x + 3\sqrt{3})\)

OpenStudy (anonymous):

just to compare.. i got y = -x/sqrt(3) -2 but he says its wrong .. i would like to see a different answer

OpenStudy (anonymous):

cruffo y' shouldnt be negative ?

OpenStudy (anonymous):

your right curffo. wonder what i was doing wrong. :l

OpenStudy (cruffo):

So that probably solves it :)

OpenStudy (cruffo):

darn negatives...

OpenStudy (anonymous):

>.<

OpenStudy (anonymous):

(2/3) * x^-(1/3) + (2/3) * y^-(1/3) * (dy/dx) = 0 dy/dx = -x^(-1/3) / y^(-1/3)

OpenStudy (cruffo):

see pic

OpenStudy (anonymous):

yes got it now .. when i plugged into x i plugged without the sign

OpenStudy (anonymous):

wow thanks a lot. should have hlped me when you saw my problem the first time. :P

OpenStudy (anonymous):

would have saved me an hr or so.

OpenStudy (cruffo):

ha! what the fun in that.

OpenStudy (anonymous):

LOL

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