Thread: implicit differentiation (double check my answer plz)

0 = x^7 + y^7 - 7axy

dy/dx = ( 7x^6 - 7y ) / (7x - 7y^6)

dy/dx = ( x^6 - y ) / (x - y^6) ( i entered this as my answer and i got it wrong :S)

Originally Posted by rock candy

0 = x^7 + y^7 - 7axy

dy/dx = ( 7x^6 - 7y ) / (7x - 7y^6)

dy/dx = ( x^6 - y ) / (x - y^6) ( i entered this as my answer and i got it wrong :S)

x^7 + y^7 - 7axy = 0

7x^6 + 7y^6 dy/dx - 7ay -7axdy/dx = 0

7x^6 - 7ay =7axdy/dx - 7y^6 dy/dx

7x^6 - 7ay =(7ax - 7y^6) dy/dx

dy/dx=(x^6 - ay) /(ax - y^6)
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Oh My Dear! you forgot "a" :P
take care next time