1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alik [6]
3 years ago
10

Someone please help ;-; ​

Mathematics
1 answer:
egoroff_w [7]3 years ago
7 0
So for A Write all numerators above the least common denominator Add the numbers
7
-
12
You might be interested in
A measure of ________ for a numerical data set describes how its values vary with a single number.
cestrela7 [59]
14 because you divide


8 0
3 years ago
What is the perimeter of a baseball diamond 90 ft on each sode
Maurinko [17]
The perimeter is 360 ft
5 0
3 years ago
Use the method of undetermined coefficients to find the general solution to the de y′′−3y′ 2y=ex e2x e−x
djverab [1.8K]

I'll assume the ODE is

y'' - 3y' + 2y = e^x + e^{2x} + e^{-x}

Solve the homogeneous ODE,

y'' - 3y' + 2y = 0

The characteristic equation

r^2 - 3r + 2 = (r - 1) (r - 2) = 0

has roots at r=1 and r=2. Then the characteristic solution is

y = C_1 e^x + C_2 e^{2x}

For nonhomogeneous ODE (1),

y'' - 3y' + 2y = e^x

consider the ansatz particular solution

y = axe^x \implies y' = a(x+1) e^x \implies y'' = a(x+2) e^x

Substituting this into (1) gives

a(x+2) e^x - 3 a (x+1) e^x + 2ax e^x = e^x \implies a = -1

For the nonhomogeneous ODE (2),

y'' - 3y' + 2y = e^{2x}

take the ansatz

y = bxe^{2x} \implies y' = b(2x+1) e^{2x} \implies y'' = b(4x+4) e^{2x}

Substitute (2) into the ODE to get

b(4x+4) e^{2x} - 3b(2x+1)e^{2x} + 2bxe^{2x} = e^{2x} \implies b=1

Lastly, for the nonhomogeneous ODE (3)

y'' - 3y' + 2y = e^{-x}

take the ansatz

y = ce^{-x} \implies y' = -ce^{-x} \implies y'' = ce^{-x}

and solve for c.

ce^{-x} + 3ce^{-x} + 2ce^{-x} = e^{-x} \implies c = \dfrac16

Then the general solution to the ODE is

\boxed{y = C_1 e^x + C_2 e^{2x} - xe^x + xe^{2x} + \dfrac16 e^{-x}}

6 0
1 year ago
Help its for someone!!​
yawa3891 [41]

Answer:

b 17/18

Step-by-step explanation:

Solve the one's in bracket then later solve everything together

5 0
3 years ago
If f(x) = 1 - x, whitch value is equivelent to f(i)
cricket20 [7]

Answer:

a). 0

Step-by-step explanation:

f(1) = 1 - 1

= 0

8 0
3 years ago
Read 2 more answers
Other questions:
  • I need help ASAP!!!!!!!!!!!!!!!
    10·1 answer
  • How far is the cruise ship????PLEASE HELP!!!!
    13·1 answer
  • How do you solve <br><img src="https://tex.z-dn.net/?f=%20-%204x%20%2B%2039%20%20%5Cgeqslant%20%20-%2029" id="TexFormula1" title
    10·1 answer
  • Subtract 1/8 from 5/6
    14·1 answer
  • Alice tossed a coin 100 times. In this experiment she recorded 53 heads and 47 tails. She
    6·1 answer
  • A=1/2(a+b)h work out the value of A when a=7, b=6 and h=10
    14·1 answer
  • I need help within second with showing work anything can help
    7·1 answer
  • There is a contest at school where students guess how many dimes are in a jar. The person whose guess is closest to the actual v
    13·1 answer
  • A ΔLMN has sides LM = 3cm, LN = 4 cm, MN = 5cm. What will be the sides of ΔABC if ΔLMN
    12·1 answer
  • Pls help plssssss thank you 20 points
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!