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kirill115 [55]
3 years ago
7

Find a general solution of y" + 4y = 0.

Mathematics
1 answer:
klio [65]3 years ago
8 0

Answer:

y(x)=C_{1}cos2x+C_{2}sin(2x)

Step-by-step explanation:

It is a linear homogeneous differential equation with constant coefficients:

y" + 4y = 0

Its characteristic equation:

r^2+4=0

r1=2i

r2=-2i

We use these roots in order to find the general solution:

y(x)=C_{1}cos2x+C_{2}sin(2x)

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3 years ago
Cesar turned in his third research report, his teacher said that he had completed 20%of the reports for the school year, how man
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Answer:

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Step-by-step explanation:

Given:

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Let the total number of research report completed during school year be 'x'.

Now we can say that;

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Dividing both side by 0.2 we get;

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Hence Cesar will be doing  15 research reports during the school year.

6 0
3 years ago
What is the difference between a copyright and a trademark, and how are they used to protect intellectual property?
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Step-by-step explanation:

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