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#1
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![]() ËÒ͹ؾѹ¸ì¢Í§
(x+y)^2 = (2x-y)^3 (x+y)/(x-y) = x^2 + y^2 ä´éà·èÒäËÃè¤èÐ |
#2
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![]() ÊÓËÃѺ¢éÍ 1. $(x+y)^2 = (2x-y)^3$
$\frac{d(x+y)^2}{dx}=\frac{d(2x-y)^3}{dx}$ $\frac{d(x+y)^2}{d(x+y)}\frac{d(x+y)}{dx}=\frac{d(2x-y)^3}{d(2x-y)}\frac{d(2x-y)}{dx}$ $[2(x+y)](1+y')=[3(2x-y)^2](2-y')$ $....$ $y'=$_________(µÔ´ÍÂÙèã¹ÃÙ» x ¡Ñº y) |
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