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Representing Situations with Differential Equations

Authored by Lisa Lee

Mathematics

11th - 12th Grade

Representing Situations with Differential Equations
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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Given the differential equation dPdt=5P\frac{\text{d}P}{\text{d}t}=5P  
A) Find the general solution for P to the differential equation
B)Find the particular solution for P to the differential equation given P(0)= 418

A) P=Ce5t

B) P= 5e418t

A) P=Ce5t

B) P= 418e5t

A) P=Cet

B) P= 418et

A) P=Ce10t

B) P= 418e10t

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Solve the differential equation  dydt=3t2y\frac{\text{d}y}{\text{d}t}=\frac{3t^2}{y}  with initial condition  𝑦(2) = 0.

𝑦 = ln(15t)

𝑦 = 16t3

𝑦 = (2𝑡3 − 16)1/2

𝑦 = (2𝑡3 −16)

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What would the sign of the square root solution to a differential equation be given the initial condition g(1)= -5?

positive

negative

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

dydx=tan⁡x+15x2+ex+1x\frac{\text{d}y}{\text{d}x}=\tan x+15x^2+e^x+\frac{1}{x}

y= -ln|sinx| + 5x3 + ex + ln|x| + c

y= secxtanx + 5x3 + ex + ln|x| + c

y= -ln|cosx| + 5x3 + ex + ln|x| + c

y= sec2(x) + 5x3 + ex + ln|x| + c

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

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dydx=4xy\frac{\text{d}y}{\text{d}x}=\frac{4x}{y} Suppose y(0)=1.
The particular solution is

B

C

D

E

6.

MULTIPLE SELECT QUESTION

5 mins • 1 pt

In drawing the slope field for the differential equation , I would place short slope lines of _________ at the points (0,1), (1,-1), and (2,-2)
  dydx=2x−3y\frac{dy}{dx}=2x-3y  

Select all that apply

-3

-1

2

5

10

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which slope field is represented by  dydx=x2\frac{\text{d}y}{\text{d}x}=x^2 ?

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