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y''+2x(y')^2=0当x=0时y=1,x=0时y'=-1/2

题目详情
y''+2x(y')^2=0 当x=0时y=1,x=0时y'=-1/2
▼优质解答
答案和解析
p=y' p'+2xp^2=0,-dp/p^2=2xdx解得:1/p=x^2+C由于x=0时y'=-1/2,解得:C=-2所以:y'=1/(x^2-2)y=∫1/(x^2-2)dx=(1/√2)ln|(x-√2)/(x+√2)|+C当x=0时y=1,解得:C=1y=(1/√2)ln|(x-√2)/(x+√2)|+1...