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Ch12-1 - y = f x y y y 1(1,2 2x y = y(x dy = 2x dx y x =1 =...

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微微微微 微微微微 y x f y 求求 , ) ( = 积积积积 y y 求求求求求求求求求求 求求求 , 积积积积积积 微微
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微微微微微微微微微 微微 微微 微微 微微 微微 微微 微微微 积积积积积积积积积 积积 积积积积 积积积积 微微微微
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积积 1. 微微微微微微 (1,2) , 微微微微微微微微微微 积 : 微微微微微微微微 y = y ( x ) , 微微微微微微微 : x x y 2 d d = = x x y d 2 C x + = 2 ( C 微微微微微 ) C = 1, . 1 2 + = x y 微微微微微微微微微 2 1 = = x y 微微微微微 2 x , 微微微微微微微 . 微微 微微 微微 微微 微微 微微
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积积 2. 微微微微微微微微 s m 20 微微微微微 , 微微微 微微微微微 , s m 4 . 0 2 - = a 微微微微微微微微微微微 . 积 : 微微微微微微微 t 微微微微 s 微 , 微微 4 . 0 d d 2 2 - = t s , 0 0 = = t s 20 0 d d = = t t s 微微微微微微微微 , 微微 2 1 2 2 . 0 C t C t s + + - = 微微微微微微微 0 , 20 2 1 = = C C 微微微微微微微微微 t t s 20 2 . 0
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