18组合
幼苗
共回答了13个问题采纳率:100% 举报
1.∵e^y+xy-e^x=0
==>e^y*y'+y+xy'-e^x=0
==>(e^y+x)y'=e^x-y
==>y'=(e^x-y)/(e^y+x)
∴dy/dx=y'=(e^x-y)/(e^y+x);
2.∵y^5+2y-x-3x^7=0
==>5y^4*y'+2y'-1-21x^6=0
==>(5y^4+2)y'=1+21x^6
==>y'=(1+21x^6)/(5y^4+2)
∴dy/dx=y'=(1+21x^6)/(5y^4+2).
1年前
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