作业帮-y - y/1-y +1
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-y - y/1-y +1
-y - y/1-y +1
-y - y/1-y +1
原式=[-y(y-1)-y+(1-y)]/(1-y)
=(-y²+y-y+1-y)/(1-y)
=(-y²-y+1)/(1-y)
-y-y/(1-y)+1
=(y²-y-y+1-y)/(1-y)
=(y²-3y+1)/(1-y)
-y - y/1-y +1
y (3y^2+8y-3)-6y(3y+2y-1)+9y
(x+y)(x-y)+4(y-1)
(y平方+2y)(y平方+2y+2)+1
方程y''=(1+y'*y')/2y的通解
(y+3)(4y-1)
微分方程y'-y=1
for(y=1;y
y'=1+y^2
（1+y）^y求导
for (y=1;y
-1+y+20y^2
matlab中y(:,y(:,1:
y+y=1/cosx
y'/y=1/x
通分 y+3/y*y-6y+9,1/2y+6,y-1/y*y-9
(y+1)(y²-y+1)+y(1+y)(1-y)
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y