Wolf Akela

I read a lot. I am confused. Does Polymorphism mean:

1. Being able to derive a class from another, ala inheritance, and

2. Overloading, like method overloading

Am I right? So polymorphism and inheritance go together?

@___@

Can anyone explain how the summation was removed in this pic?

http://img514.imageshack.us/img514/9531/summb.jpg

Say I have 3 event probabilities:

P(A1) = 0.22

P(A2) = 0.25

P(A3) = 0.28

(they don't add up to 1)

I need to find P(A1' intersection A2'), which is equal to P(A1 union A2)'.

I've read that there's a property where:

--> P(A) + P(B)' = 1

Which means I can do:

--> P(A1 union A2)' = 1 - P(A1 union A2)

However, the probabilities of all events don't add up to 1. Do I still subtract P(A1 union A2) from 1, or do I subtract it from 0.75, since it is the sum of the probabilities?

I've heard Volts * Amps = Watt, but seriously, I REFUSE to believe that my monitor consumes (220V * 1.8A) = 396W. My PSU is only 475W and I find it totally difficult to believe that the rest of my computer would only consume 79W, which is IMPOSSIBLE. I used a calculator, and it said my rig would consume ~250W.

Calculator that doesn't factor in the monitor:

http://www.extreme.outervision.com/PSUEngine

I was gonna get a 650VA UPS, so I'm a bit worried.

Will these two yield the same current value on the multimeter?

http://img129.imageshack.us/img129/7729/currentve5...

You're taking an exam and you must answer EXACTLY 9 items out of 12. In how many ways can you select the 9 problems if:

a) you can choose ANY 9 out of 12 items

b) you must choose 4 from the first 6 and 5 from the last 6 problems

c) you must choose *at least* 4 from the first 6 problems.

It would be great if you guys could explain it.

The form is practically "ab/cd" (I think). See the link image so it'll be easier to read.

http://img529.imageshack.us/img529/1403/derivative...

First time I encountered something like this, I normally get only three variables in one term, and I think splitting it to (ab/c * 1/d) or something just complicates it, because I still have to go with the multiplication rule.

Okay, I know that Dx[fg] = f'g + fg', but what if I had four terms? Like, f, g, h and i?

So I've been given a function and its derivatives:

f(x) = x² / (x-1)²

f'(x) = -2x / (x+1)³

f''(x) = 2(1 + 2x) / (x-4)^4

1) Find intervals where f(x) is increasing/decreasing.

== I just found the values for f'(x) where x is greatier/less than zero. Did I do right?

2) Find the intervals where f(x) is concave upward/downward.

== I just found the values for f''(x) where x is greater/less than zero. Is it right?

3) Determine relative optimum points & points of inflection.

== I have no idea how to get optimum points. As for points of inflection, my notes said the possible points of inflection are values for x where f'(x) can be zero. Was that right?

4) Sketch the graph. Is it possible without values of y? I can sketch a graph, but without any y value, so it's still hazy.

I've been trying to play games on MSN, and it won't let me. It just says "Connecting...", even after waiting for half an hour (I'm on broadband). My friend says the game is just waiting for me from his side, but mine is not connecting.

Ok, so a particle moves at a horizontal line at the speed of 1 foot/sec.

If the particle moves according to the distance equation s = sqrt(8-t^2) where s is the distance in feet from the origin of the horizontal line.

I don't understand this. I've been given the speed and the distance formula. How can I find the exact distance if I don't have the time? And somehow, I think using "s" as the variable for the distance formula was just to confuse this, so I used "s" for speed and "t" for time and "d" for distance.

Help?

I've got a bit of homework here. "Perform ff. calculations in 8-bit two's complement numbers".

So I think it's just adding binary digits, but do I need to keep it to 8 digits? Because stuff like:

... 1111 1111

+ 1111 1111

equals 1 1111 1110 if I spell it completely.

Also, about the subtraction of binary, I've read I just invert the digits of the subtractor and continue with addition. But one problem was this:

... 0000 0000

- 1111 1111

If I invert it and continue with addition, it would be 0000 0000 + 0000 0000 = 0000 0000, which doesn't make sense. Converting it to binary means 0 - 255, and it's NOT equal to zero.

===

About the memory, our homework gave a list of examples of memories, and we had to say if it's possible/reasonable and explain why. One example was:

10-bit address, 1024 cells, 8-bit cell size

I checked our lecture slides and there were examples and the boxes (bits?) all just summed up to 96 (multiplying # of cells by bit size). Like, 12-bit size with 8 cell = 96.

It ALWAYS says that the comment could not be posted because "it either contains an email link or a URL". But it doesn't! Here's the exact comment I typed out:

"Yep, I'm a big fan of this! You? It's not showing on TV nowadays though, I really miss it, for one thing because it's one of the few anime titles in our country that was actually dubbed properly. I really love the dubs. T_T

Go on, blow your credit and share it with everyone. XD I don't know about subbing though. If it had subtitles I could probably just use Google's translator to translate it to English like what I did for this vid, had help from a German friend."

How to convert to IEEE single-precision format? It kinda doesn't make sense, I don't understand how that format even looks like.

For example, how do I convert "9" to that format? "6.125"? "5/32"?

Note: it's not for writing a program. Just basic pen and paper.

For example, I'm downloading a big file (like anime) and I'm at 50%. I wanna see a bit of it now, so where does IE6 store the partial download? It wasn't in the Temporary Internet Files.