2y-2.4=0.5y-0.6
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2y-2.4=0.5y-0.6
2y-2.4=0.5y-0.6
2y-2.4=0.5y-0.6
2y-2.4=0.5y-0.6
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
yy''-(y')^2=y^2y'
yy''-(y')^2=y^2y'
y+y'-2y=2x
微分方程y - 2y' + y = x
2y''+y'-y=0
A={(x,y)|y>=0.5|x-2|},B={(x,y)|y
(3-4Y)(3+4Y)+(3+4Y)^2,其中Y=0.5
··0.4y+0.9/0.5-y-5/2=0.3+0.2y/0.3求y
·0.4y+0.9/0.5-y-5/2=0.3+0.2y/0.3求y
y'(2y-y')=y^2*(sinx)^2求解,
(y^2)^4y-(-2y)^3y^6=
方程y''=(1+y'*y')/2y的通解
y'=1+y^2
(x+3y)²-2(x-y)(x+y)+(x+y)²其x=0.5,y=-2
数学题=y(y+3)-4(y+3)2=(y+3)(y-4y-12)
y(y-2)²-y(y+3)(y-5) y=1/2 化简求值