2 years ago

Helpppppp kddbbbjkluuuu

Mathematics

1 answer:

poizon [28]2 years ago

5 0

How many questions are there?

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Some one please help me on this I am very much dum

AURORKA [14]

I don’t know this one either bro

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2 years ago

Plz help me with this

Artemon [7]

Answer:

C Is the corect answer

Step-by-step explanation:

Brcause you multiple the 4 and 8 = 38

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2 years ago

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Hitman42 [59]

Answer:

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Step-by-step explanation:

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2 years ago

If a person high jumps 6 feet 8 inches, how many inches is the jump?

LenaWriter [7]

Answer:

80 inches

Step-by-step explanation:

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2 years ago

Read 2 more answers

(b) dy/dx = (x - y+ 1)^2

Elanso [62]

Substitute $v(x)=x-y(x)+1$ , so that

$\dfrac{\mathrm dv}{\mathrm dx}=1-\dfrac{\mathrm dy}{\mathrm dx}$

Then the resulting ODE in $v(x)$ is separable, with

$1-\dfrac{\mathrm dv}{\mathrm dx}=v^2\implies\dfrac{\mathrm dv}{1-v^2}=\mathrm dx$

On the left, we can split into partial fractions:

$\dfrac12\left(\dfrac1{1-v}+\dfrac1{1+v}\right)\mathrm dv=\mathrm dx$

Integrating both sides gives

$\dfrac{\ln|1-v|+\ln|1+v|}2=x+C$

$\dfrac12\ln|1-v^2|=x+C$

$1-v^2=e^{2x+C}$

$v=\pm\sqrt{1-Ce^{2x}}$

Now solve for $y(x)$ :

$x-y+1=\pm\sqrt{1-Ce^{2x}}$

$\boxed{y=x+1\pm\sqrt{1-Ce^{2x}}}$

3 0

3 years ago