1.求下列微分方程的通解:-|||-(1) dfrac (dy)(dx)+y=(e)^-x ;-|||-(2) '+y=(x)^2+3x+2;-|||-(3) '+ycos x=(e)^-sin x;-|||-(4) '+ytan x=sin 2x;-|||-(5) ((x)^2-1)y'+2xy-cos x=0;-|||-(6) dfrac (drho )(dtheta )+3rho =2;-|||-(7) dfrac (dy)(dx)+2xy=4x =-|||-(8)ylnydx+(x-lny)dy=0;-|||-(9) (x-2)dfrac (dy)(dx)=y+2((x-2))^3 =-|||-(10) ((y)^2-6x)dfrac (dy)(dx)+2y=0.