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Mathematics, Science and Technology

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351

Anonymous 13/12/02(Mon)00:06 No. 351

/calc/, how do i prove that y" = -3x^2/y^7 ?

>>

Anonymous 13/12/02(Mon)21:48 No. 352

Take the first line of "your answer"; rearrange to get y' = -x^3/y^3. Now differentiate wrt x. You'll get a dy/dx in the denominator, but you've already got an expression for dy/dx. Sub in and simplify and it should work (you'll need to re-use the given equation).

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