Variation of Parameters herupu

[FHamster]

Homework Statement

y'' + y' = 4t

Homework Equations

Use Variation of parameters!

The Attempt at a Solution

So I get homo of: c1 + c2 e^-(t)

From there I get a Wronskian of
-e^(-t)

Then I get variations 2t^2 and -4e^t(t-1)

Then get the answer of 2t^2 + 4t - 4

Btu its wrong :< uguu

 

[ehild]

Then get the answer of 2t^2 + 4t - 4

Check the signs.

ehild

 

[FHamster]

derp

 

[HallsofIvy]

derp?
herupu?
uguu?

What language is this?

 

[DryRun]

derp?
herupu?
uguu?

What language is this?

LOL! I couldn't resist clicking on the title.

FHamster, nobody is going to take your questions/problems seriously if you use weird words to accompany your academic ventures.

 

[ehild]

derp

You mean my answer was stupid? Thank you.

ehild

 

[FHamster]

weaboonese

I mean I derped

 

[sid9221]

So I get homo of: c1 + c2 e^-(t)

LOL he said homo(I am such a child)

 

[DryRun]

LOL he said homo(I am such a child)

How did i miss that?

 

[ehild]

FHamster,

We use English here. I tried to help you, could you answer something in normal English?

ehild

 

[FHamster]

FHamster,

We use English here. I tried to help you, could you answer something in normal English?

ehild

It was very helpful. Thank you.