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rjkz [21]
2 years ago
8

Subject:Mathematics ​

Mathematics
2 answers:
lys-0071 [83]2 years ago
4 0

Answer:

Step-by-step explanation:

naturally id put it as length x width then divide it by 2 but for now  "divide the height and multiple the length" seems the best

sertanlavr [38]2 years ago
3 0

Answer:

A?

Step-by-step explanation:

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Complete Question

The complete question is shown on the first uploaded

Answer:

y_1 is not a solution of the differential equation

 y_2 is not a solution of the differential equation

y_3 is not a solution of the differential equation

Step-by-step explanation:

The differential equation given is y'' + y' = cos2x

Let consider the first equation to substitute

y_1  = cosx  +sinx

y_1'  = -sinx  +cosx

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So

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This means that y_1 is not a solution of the differential equation

Let consider the second equation to substitute

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y_2' =  -2sin2x

y_2'' =  -4cos2x

So

y_2'' + y_2'  = -4cos2x-2sin2x

So

-4cos2x-2sin2x \ne  cos2x

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y_3 =  sin 2x

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So

y_3'' + y_3'  = -4sin2x  - 2cos2x

So

-4sin2x  - 2cos2x \ne  cos2x

This means  that  y_3 is not a solution of the differential equation

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