transformation of function
dy/dx = (2x +y -1) / ( 4x -2y +1) , x= X +1 , y = Y-1 ,, how to make it into differential equation ? my ans is not same as the ans given .
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Original post by wilson dang
dy/dx = (2x +y -1) / ( 4x -2y +1) , x= X +1 , y = Y-1 ,, how to make it into differential equation ? my ans is not same as the ans given .
maybe it is the same answer
I can check it in half hour or so
Original post by TeeEm
maybe it is the same answer
I can check it in half hour or so
I can check it in half hour or so
thanks in advance
Original post by wilson dang
dy/dx = (2x +y -1) / ( 4x -2y +1)
, x= X +1 , y = Y-1 ,, how to make it into differential equation ? my ans is not same as the ans given .
dy/dx = (2x +y -1) / ( 4x -2y +1)
, x= X +1 , y = Y-1 ,, how to make it into differential equation ? my ans is not same as the ans given .
also after I spend ages with tedious horrible algebra I realized that the ODE you are quoting is different to the one in your workings
Please post a photo of the question itself
3c
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Sent from my C6502 using Tapatalk
Original post by wilson dang
then clearly this is not the same as the one in the opening post whose algebra is horrendous !!
Original post by TeeEm
then clearly this is not the same as the one in the opening post whose algebra is horrendous !!
Why not same??
Original post by wilson dang
Why not same??
because there is an extra 4 in front of the x
Original post by TeeEm
because there is an extra 4 in front of the x
Sorry for the typo. So, the question is as in the 2nd photo I posted
Original post by wilson dang
Sorry for the typo. So, the question is as in the 2nd photo I posted
well I am sorry but I solved the one with the typo ...
Original post by TeeEm
I got (x-y-2)2(x+y-2)(x-y)=constant
your integration is all wrong (I cannot follow it).
Up to there is fine
your integration is all wrong (I cannot follow it).
Up to there is fine
can you show your work please?
Original post by wilson dang
can you show your work please?
http://www.madasmaths.com/archive/maths_booklets/advanced_topics/odes_systematic_1.pdf
PAGE 81
is this a book?
Original post by wilson dang
is this a book?
yeah
Original post by wilson dang
i redo the question , i found that (1+2v)/ (1-v^2) = 1.5/ (1-v) - 0.5/(1+v) , why the ans is not same as the book ???
maybe there is a mistake in the example book maybe a mistake in yours
Original post by TeeEm
maybe there is a mistake in the example book maybe a mistake in yours
could you explain how to change the top part to the lower part (red circled part) ?
Original post by wilson dang
could you explain how to change the top part to the lower part (red circled part) ?
??
cannot see the attachment
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