Recent content by Hamid1

Thanks. That's exactly what I asked.

Thank you stevenb. Can you explain how do I determine which one is Positive and which on is Negative?

Hi all, In following image thare are Positive(+) and Negative(-) signs on above and under VEB and VCB What's meaning of these signs?are they polarity of transistor? why beside connection to ground is a negative sign? thanks in advance.

Thank you CompuChip for the answer. Yes, I can solve it.

I guessed this: F=7G+1 F=9G But i think it's wrong;

Hi all. I want a mathematical model for this problem: "There is a few fishes and fish-globes.If we put 7 Fishes in each fish-globe then a single fish remains. and If we put 9 Fishes in each fish-globe then a single-fish globe reamins empty.What's number of fishes and fish-globes?" Thank...

Thank you all.

Thank you. and another question: I have read this in my book => v=y/x dv/dx=... My question is : although V function has more than one variable why the author has used (dv/dx) instead of ∂v/∂x?(y and x are variables) (you said that dy/dx is used when there is a single variable).

Hi all. Can anyone tell me what's difference between (∂y/∂x) and (dy/dx) and (fx) and (y`)? Thanks.[SIZE="2"](please tell me my probable English mistakes!) [SIZE="1"]I asked this a few month ago but it seems that images in topic are not avaible (I think I have removed it from my server )

Hi all. I know concept of derivation but I don't know the differences between these: http://hamid693.persiangig.com/qu.jpg can anyone explain what's difference between these?(1 to 5) Thanks[SIZE="2"](and excuse me for my probable English mistakes

Thank you, I checked the link.It works...

Hi all, can anybody complete my answer?(I'm unable to solve the second part of the integral) problem and answer(incomplete) : [PLAIN]www.andishe9.com/integral.bmp[/URL] thanks and excuse me for english;)

Can you tell me how?Because I don't know english(partial fractions) very well.

Thank you.the first part is easy to solve but how can I solve the second part?

can you explain more? I have solved about 100 integrals but I can't do these two.I don't know the method. thank you.