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Differential Equation (Separable Variable)

Total questions: 10

Worksheet time: 5mins

Name
Class
Date
1.

The following Differential Equation is
dydx=yx\frac{\text{d}y}{\text{d}x}=\frac{y}{x}  

a)

Separable.

b)

Non Separable

2.

The following Differential Equation is
dydx=x2y+x\frac{\text{d}y}{\text{d}x}=x^2y+x  

a)

Separable.

b)

Non Separable.

3.

The following Differential Equation is
xdydx=yx2x\frac{\text{d}y}{\text{d}x}=yx^2  

a)

Separable.

b)

Non Separable.

4.

The following Differential Equation is
dydx=y2+xy2\frac{\text{d}y}{\text{d}x}=y^2+xy^2  

a)

Separable.

b)

Non Separable.

5.

The following Differential Equation is
dydx=eyex\frac{\text{d}y}{\text{d}x}=\frac{e^y}{e^x}  

a)

Separable.

b)

Non Separable.

6.

Solve the following differential equations:
dydx=yx\frac{\text{d}y}{\text{d}x}=\frac{y}{x}  

a)

y=Axy=Ax  

b)

y2=lnx+Cy^2=\ln x+C  

c)

lny=x22+C\ln y=\frac{x^2}{2}+C  

d)

A=yxA=yx  

7.

Solve the following differential equations:
dydx=1cosy\frac{\text{d}y}{\text{d}x}=\frac{1}{\cos y}  

a)

siny=1+C\sin y=1+C  

b)

siny=x+C\sin y=x+C  

c)

siny=x22+C-\sin y=\frac{x^2}{2}+C  

d)

siny=0+C\sin y=0+C  

8.

Solve the following differential equations:
dydx=3y\frac{\text{d}y}{\text{d}x}=3y  

a)

y=Ce3xy=Ce^{3x}  

b)

y=3x+Cy=3x+C  

c)

y22=3x+C\frac{y^2}{2}=3x+C  

d)

lny=x+C\ln y=x+C  

9.

Solve the equation

dxdt=3xt2\frac{dx}{dt}=3xt^2  

a)

x=et3+ Cx=e^{t^3}+\ C  

b)

x=Ce+t3x=Ce+t^3  

c)

x=Cet3x=Ce^{t^3}  

d)

x=et+3Cx=e^t+3C  

10.

Solve the initial value problem

y=x3(1y)    ,      y(0)=3y'=x^3\left(1-y\right)\ \ \ \ ,\ \ \ \ \ \ y\left(0\right)=3  

a)

y=ex4+8y=e^{-x^4}+8  

b)

y=2ex44+1y=2e^{\frac{-x^4}{4}}+1  

c)

y=x44+Cy=\frac{-x^4}{4}+C  

d)

y=ex42+1y=e\frac{-x^4}{2}+1