It does. When derivating in terms of x, you consider y as a constant. When derivating in terms of y, you consider x as a constant. Hence two different results.f(x,y)=x2 In( (3 y2 2x)
= [x2 a/ax In(3 y2-2x)+In(3 y2 -2x) a/ax x2]dx + [x2 *1/3 y2-2x a/ay(3 y2 - 2x)]dy
why is solving dx and dy different ?Not symm matter?
Essentially yes. The differential rules that apply to x in this instance are as those that you would apply to a constant.when differienting dy, x is treated as a constant, that means all x value remain unchange?
Can I know how was dy work out.I mean the working. I am still a little confused.Pls enlight.Thanks.Essentially yes. The differential rules that apply to x in this instance are as those that you would apply to a constant.
Sure, but can I ask that you write up the original formula so that it reads correctly?Can I know how was dy work out.I mean the working. I am still a little confused.Pls enlight.Thanks.
I have scan a copy of the question but seem like the there is some error in here. I not able to upload file.
Don't use the 'safety pin', use the 'Manage Attachments' button on the Additional Options section below the Reply to Thread section.The safety pin like icon is not highlighted when pointing the curser at it.There is also a message at the bottom left hand side saying: Done,but with error on page .
Sorry for my case, there is no manage attachment on the additional options section.I couldn't find it.Don't use the 'safety pin', use the 'Manage Attachments' button on the Additional Options section below the Reply to Thread section.
Additionally, the error is an issue at the client side. Do you have another web browser you can use to see if you upload the image?
My screen do not have the feature of what you have made a circle on it.No Manage attachment button available.Here is a screen shot that shows the "Manage Attachments" button in the "Additional Options" panel that is available when you use the standard "Post Reply" feature. The "Quick Reply" feature does not have this function.
eggtree,My screen do not have the feature of what you have made a circle on it.No Manage attachment button available.
I have tried to change the setting but it did not work.So I try it attached the file using the pc at my work place.eggtree,
Firstly, can you firstly clarify what browser you are using? And what if any add-ons, extensions that you are using (e.g. ad-blockers etc).
Secondly, can you go to:
- UserCP (top-left)
- Edit Options (on left)
Scroll to the bottom - Miscellaneous Options - and check that your Message Editor Interface is set to either the "Standard Editor" or "Enhanced Interface". If not, change it to one of the options and save your settings. Does this help?
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by Jake Hertz