Math Is Fun Forum

Where can I find chart ?

We take Frobenius and Laplace to solve D.E .I have 5 examples that covered the subject but I have some problems with series like

how to Convert series into a general equati

   1+x+x^2+x^3= [[1/(1-x)]]  something like that

and what is familiar function ??

Thanks for your time

Fourier series any examples ?

Yes , and he still until now refused to give the answer

I solved the first one and send it to my professor , But he did not give me the answer   

may be solved by fourier series

I need example like that I posted but with answer 

untill now it easy

I preferred hand way but just increase my information

Thanks 

we soon have exam and I still good enough with laplace and other subjects .

thanks for helping me and communicate with me

Yes

y'+y=1 where  y(0)=0

y'+2y=1+exp(t)   where y(0)=3
     
      t
y+∫ y(t)dt=1
   0

y''-y'-2y=3cos(2t)-11sin(3t) where y(0)=0, y'(0)=6

But this is easy one but the others .......

I think  5/4(e(-4t) because by parital ..  A=-B and A=5/4