谢谢~~其实直接把x看成y代入x'+P(y)x=Q(y)就行了。。
(y^2+6x)y'+2y=0 求通解.
若 y 不等于 0 则 y^2 + 6x + 2 = 0 即 y^2 = -6x - 2 则 y = (正负)√( -6x - 2)则有 (-6x - 2)> 0 解得 x < - 1\/3 (2); 综合(1)(2) 方程的通解为 x< - 1\/3
(y^2+6x)y'+2y=0 求通解。谢谢
解:∵(y^2-6x)y'+2y=0 ==>(y^2-6x)y'=-2y ==>(y^2-6x)dy\/dx=-2y ==>dx\/dy=(y^2-6x)\/(-2y)==>dx\/dy=3x\/y-y\/2 ==>dx\/dy-3x\/y=-y\/2 ∴先解齐次方程dx\/dy-3x\/y=0的通解 ∵dx\/dy-3x\/y=0 ==>dx\/dy=3x\/y ==>dx\/x=3dy\/y ==>ln|x|=3ln|y|+l...
求微分方程的通解(y∧2-6x)y'+2y=0
把变量x当成因变量,变量y当成自变量,就可以改写为线性微分方程:x'-(3\/y)x=-y\/2,下一步用公式求解即可。
(y^2-6x)y'+2y=0 求通解。
解:∵(y^2-6x)y'+2y=0 ==>(y^2-6x)y'=-2y ==>(y^2-6x)dy\/dx=-2y ==>dx\/dy=(y^2-6x)\/(-2y)==>dx\/dy=3x\/y-y\/2 ==>dx\/dy-3x\/y=-y\/2 ∴先解齐次方程dx\/dy-3x\/y=0的通解 ∵dx\/dy-3x\/y=0 ==>dx\/dy=3x\/y ==>dx\/x=3dy\/y ==>ln|x|=3ln|y|+l...
大一微积分(一阶线性微分方程)(y²-6x)y'+2y=0,求它的通解...
∵(y^2-6x)y'+2y=0 ==>(y^2-6x)y'=-2y==>(y^2-6x)dy\/dx=-2y==>dx\/dy=(y^2-6x)\/(-2y)==>dx\/dy=3x\/y-y\/2==>dx\/dy-3x\/y=-y\/2∴先解齐次方程dx\/dy-3x\/y=0的通解∵dx\/dy-3x\/y=0 ==>dx\/dy=3x\/y==>dx\/x=3dy\/y==>ln|x|=3ln|y|+ln|C| (C是积...
数学问题:求下面微分方程的通解或特解: (y^2-6x)y′+2y=0 等待在线
简单计算一下即可,答案如图所示
微分方程问题 求(y^2-6x)y'=2y=0 的通解
解:∵(y^2-6x)y'+2y=0 ==>(y^2-6x)y'=-2y ==>(y^2-6x)dy\/dx=-2y ==>dx\/dy=(y^2-6x)\/(-2y)==>dx\/dy=3x\/y-y\/2 ==>dx\/dy-3x\/y=-y\/2 ∴先解齐次方程dx\/dy-3x\/y=0的通解 ∵dx\/dy-3x\/y=0 ==>dx\/dy=3x\/y ==>dx\/x=3dy\/y ==>ln|x|=3ln|y|+l...
求下面微分方程的通解或特解:(y^2-6x)y′+2y=0
简单计算一下即可,答案如图所示
(y^2-6x)y'+2y=0的通解怎么求
用积分因子法计算,凑成全微分方程也就是恰当微分方程。
求一阶线性方程(y^2-6x)y'+2y=0的通解
y\/dx=-2y\/(y^2-6x)dx\/dy=-(y\/2-3x\/y)即 dx+3\/y*x=-2\/y由常数变异法得x=-1\/10y^2+cy^(-3)