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# transformation of function watch

1. 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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2. (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
3. (Original post by TeeEm)
maybe it is the same answer
I can check it in half hour or so
4. (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 .
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
5. 3c

Sent from my C6502 using Tapatalk
6. (Original post by wilson dang)
then clearly this is not the same as the one in the opening post whose algebra is horrendous !!
7. (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??
8. (Original post by wilson dang)
Why not same??
because there is an extra 4 in front of the x
9. (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
10. (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 ...
11. I got (x-y-2)2(x+y-2)(x-y)=constant

Up to there is fine
12. (Original post by TeeEm)
I got (x-y-2)2(x+y-2)(x-y)=constant

Up to there is fine
13. (Original post by wilson dang)

PAGE 81
14. is this a book?
15. (Original post by wilson dang)
is this a book?
yeah
16. (Original post by TeeEm)
yeah
deleted
17. (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
18. (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) ?
19. (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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