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Mathematics 8 Online
OpenStudy (diamondboy):

what is dy/dx (y)

OpenStudy (anonymous):

What is the equation?

OpenStudy (diamondboy):

Find dy/dx by implicit differentiation. x4y7 − y = x

OpenStudy (diamondboy):

x^4Y^7-y=x

OpenStudy (anonymous):

Is it \[x^4y^7-y=x\] ?

OpenStudy (diamondboy):

yes

OpenStudy (anonymous):

k so I would start off by differentiating both sides

OpenStudy (anonymous):

for \[x^4y^7\] you must use product rule

OpenStudy (diamondboy):

yea I did dat

OpenStudy (anonymous):

what did you get?

OpenStudy (diamondboy):

I had \[7xy^6 dy/dx + y^7\]

OpenStudy (anonymous):

Derivative of \[x^4 = 4x^3\]

OpenStudy (anonymous):

multiply that by \[y^7\]

OpenStudy (diamondboy):

ok

OpenStudy (anonymous):

Then derivative of \[y^7 = 7y^6* y \prime\]

OpenStudy (anonymous):

multiply that by \[x^4\]

OpenStudy (anonymous):

And you add the two sides that should be the answer to the product rule part

OpenStudy (diamondboy):

\[7y^6x^4*dy/dx + 4x^3y^7\]

OpenStudy (anonymous):

now plug that into the rest of the equation

OpenStudy (diamondboy):

ok

OpenStudy (diamondboy):

|dw:1424465480398:dw|

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