Question

solve xd2y/dx2+dy/dx+xy=0​

Answer 1

Answer:

$y=\frac{-x^{2} }{4}+c1$㏒║$x$║$+c2$

Step-by-step explanation:

We have been given an equation as shown below:

$x\frac{dx^{2} }{dx^{2} } +\frac{dy}{dx} +xy=0$

$d(x.\frac{dy}{dx})+x=0$

$=d(x.\frac{dy}{dx})+y\\=x.\frac{d^{2}y }{dx^{2}}+\frac{dy}{dx}  \\=x.\frac{dy}{dx}=-\frac{x^{2} }{2}+[tex]c1$

$\int\limits\frac{dy}{dx}= \int\limits\frac{-x}{2}+\frac{c1}{x}$

$y=\frac{-1}{2}.\frac{x^{2} }{2}+c1.$㏒║$x$║+c2

$y=\frac{-x^{2} }{4}+c1$㏒║$x$║$+c2$

Thus,the solution is $y=\frac{-x^{2} }{4}+c1$㏒║$x$║$+c2$.

Answer 2

The life of 1000 bullets $1000 normally distribute with mean life 1620 horse and and standard deviation chin 300 horse find the number of ballups which would Che would they eye out after a useful life a useful life of Knight and red horse 900 hours z=2.4 area is0.4818