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輝念了崔遍匈 >> z=F(3x+2y,4x%3y) >>

z=F(3x+2y,4x%3y)

z=f(3x+2y,4x-3y) ∂z/∂x=3f1+4f2 ∂z/∂y=2f1-3f2

Z=(3x^2+y^2)/(4x-2y) Zx'=[(3x^2+y^2)'(4x-2y)-(4x-2y)'(3x^2+y^2)]/(4x-2y)^2 緩侃(3x^2+y^2)'(4x-2y)'譲頁斤x箔擬 =(6x(4x-2y)-4(3x^2+y^2)]/(4x-2y)^2 =(12x^2-12xy-4y^2)/(4x-2y)^2 =(3x^2-3xy-y^2)/(2x-y)^2 Zy'=[(3x^2+y^2)'(4x-2y)-(4...

低議籾朕頁z=(3x^2+y^2)^(4x+2y)珊頁z=(3x²+y²)^4x+2y深拮菠杷意滷泌頁朔宀恂隈窃貌。 z= (3x^2+y^2)^(4x+2y)=e^[(4x+2y)ln(3x^2+y^2)] ∂z/∂x= (3x^2+y^2)^(4x+2y)[4ln(3x^2+y^2)+6x(4x+2y)/(3x^2+y^2)] ∂z/&...

1、箔陶擬祥頁繍凪麿議延楚輝撹械方 . 2、醤悶議盾基狛殻泌和飛泣似慧寄夕頭厚紗賠漣。 . 3、和中議箔擬狛殻匆屬苧阻屈竣詞擬涙胎豊枠豊朔潤惚頁匯劔議。 .

x-2y+4z=12 3x+2y+z=1 4x-z=7 +抖4x+5z=131蛍盾 4x+5z=13 4x-z=7 誼 x=2 z=1 3蛍旗秘抖y=-31蛍÷圻圭殻怏議盾葎 x=2 y=-3 z=1 1蛍

3x+2y+5z=2!!1 x-2y-z=6!!2 4x+2y-7z=30!!31+24x+4z=8,x+z=2,x=2-z(2)+(3)5x-8z=36,繍x=2-z旗秘緩塀柴麻誼z=-2旗秘x=2-z誼x=6y=-3{x=6[y=-3{z=-2

3x-2y+z=3 A 2x+y-z=4 B 4x+3y+2z=-10 C A+B=5x-y=7 D 2B+C=8X+5Y=-2 E 5D+E=33X=33 盾誼X=1 夸A=3-2y+z=3 B=2+y-z=4 盾誼 Z=-4 Y=-2

蓉垈議歌方圭殻頁x=4cost,y=3sint,t貫0欺2π W宗(3x-4y)dx(4x+2y)dy-4y^2dz宗(3x-4y)dx(4x+2y)dy 宗(0,2π) [(12cost-12sint)*(-4sint)(16cost+6sint)*3cost]dt 宗(0,2π) 48dt 96π

3x+2y4x?3y5擅盾隈匯┝喙隈頃-據3誼3x+2y-3x-3y=4-3〜53x+2y-3x+9y=4-15軸11y=-11盾誼y=-1旗秘敲州誼x=2絞圻圭殻怏議盾葎x2y?1盾隈屈┫秘隈采柊攀達x=3y+5曖委朶秘拱州誼33y+5+2y=4盾誼y=-1...

壓3X+2y=28朔炎倖截壓和中匯倖塀徨朔炎匯倖擅X4=12x噴8y=80炎曖X3=12x噴9y=91炎∠

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