dw/ dt باستخدام قاعدة السلسلة ، فإن W=x? + y? X=cos t y=sin t = 0 = اللانهاية لا أحد من الآخر = 2 sin t cos t-2 cost sin t حل x² +3y? dy/dx= 2ху 9O In y = In (1 + y^ 2 / x ^ 2) + c

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A: Given  By chain rule of differentiation , we have

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A: Thus solution is

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