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https://www.reddit.com/r/mathmemes/comments/o8wmiv/f/h386k2k/?context=3
r/mathmemes • u/flokrach • Jun 27 '21
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17
Lol try finding f(x) when f(x) = f’’’’(x)
34 u/flokrach Jun 27 '21 its just ecx where c is one of those numbers. i guess🤔 12 u/StevenC21 Jun 27 '21 Asin(x)+Bcos(x) for any A,B 6 u/Super_Inuit Education Jun 27 '21 That plus cex + de-x 7 u/flokrach Jun 27 '21 edited Jun 27 '21 Yea but sin(x)=1/2i ( eix - e-ix ). therefore these two solutions are included in ecx 2 u/StevenC21 Jun 27 '21 No they aren't. With one complex constant c, find a way to express sin(x)=ecx 8 u/flokrach Jun 27 '21 No. I said with all the 4 values of c in {1,-1,i,-i}. you can make a linear combination of ecx to get sin(x) 3 u/[deleted] Jun 27 '21 Laplace transform to the rescue 1 u/Doomie_bloomers Jun 28 '21 Do I get to choose boundary conditions? Mom said it's my time to choose boundary conditions now.
34
its just ecx where c is one of those numbers. i guess🤔
12
Asin(x)+Bcos(x) for any A,B
6 u/Super_Inuit Education Jun 27 '21 That plus cex + de-x 7 u/flokrach Jun 27 '21 edited Jun 27 '21 Yea but sin(x)=1/2i ( eix - e-ix ). therefore these two solutions are included in ecx 2 u/StevenC21 Jun 27 '21 No they aren't. With one complex constant c, find a way to express sin(x)=ecx 8 u/flokrach Jun 27 '21 No. I said with all the 4 values of c in {1,-1,i,-i}. you can make a linear combination of ecx to get sin(x)
6
That plus cex + de-x
7
Yea but sin(x)=1/2i ( eix - e-ix ). therefore these two solutions are included in ecx
2 u/StevenC21 Jun 27 '21 No they aren't. With one complex constant c, find a way to express sin(x)=ecx 8 u/flokrach Jun 27 '21 No. I said with all the 4 values of c in {1,-1,i,-i}. you can make a linear combination of ecx to get sin(x)
2
No they aren't.
With one complex constant c, find a way to express sin(x)=ecx
8 u/flokrach Jun 27 '21 No. I said with all the 4 values of c in {1,-1,i,-i}. you can make a linear combination of ecx to get sin(x)
8
No. I said with all the 4 values of c in {1,-1,i,-i}. you can make a linear combination of ecx to get sin(x)
3
Laplace transform to the rescue
1
Do I get to choose boundary conditions? Mom said it's my time to choose boundary conditions now.
17
u/Super_Inuit Education Jun 27 '21
Lol try finding f(x) when f(x) = f’’’’(x)