Are these the correct answers for the following questions?(adsbygoogle = window.adsbygoogle || []).push({});

1 Solve the Bernoulli equation.

a) [tex]x\frac{dy}{dx}+67=3xy^\frac{4}{3}[/tex]

What I got:

[tex]\frac{1}{y^\frac{1}{3}}=x+cx^2[/tex]

b) [tex]x^2y'+2xy=5y^4[/tex]

What I got:

[tex]2y^(-3)=\frac{30}{13}\frac{1}{x}+cx^12[/tex]

2 Solve each differential equation.

a) [tex]xy''+2y'=6x[/tex]

What I got:

I let u=y', y''=du/dx

[tex]y=x^2-\frac{c_1}{x}+c_2[/tex]

b) [tex]y^3y''=1[/tex]

What I got:

I let u=y', y''=udu/dy

[tex]y=c_1\sqrt{csc(x+c_2)}[/tex]

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# Homework Help: Can someone check a couple of these?

Can you offer guidance or do you also need help?

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