Thứ Sáu, 13 tháng 1, 2012

Kiem tra cuoi ki toan C2


Câu 1: Cho bài toán quy hoạch tuyến tính (QHTT) sau:

với các điều kiện ràng buộc

Xét các vectơ ,  và . Tìm khẳng định đúng.
A. y không là PA, x và z đều là PACB.
B. x và y không là PA, z là PACB;
C. x không là phương án (PA), y z đều là phương án cực biên (PACB);
D. Cả x, y, z đều là PA nhưng ít nhất một trong ba vectơ x, y, z không là PACB;
Câu 2: Xét không gian các vectơ dòng 3 chiều R3 với cơ sở (u1 = (1, 1, 0), u2 = (1, 2, 0), u3 = (0, 0, 1)). Tọa độ (x, y, z) của vectơ dòng v =  (3, 4, 2) trong R3 đối với cơ sở này là
A. (x, y, z) = (1, 1, 2). B. (x, y, z) = (2, 1, 1) C. (x, y, z) = (2, 1, 2). D. (x, y, z) = (1, 2, 1).:
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De thi toan C2 cuoi ki

Thứ Sáu, 2 tháng 12, 2011

The One That Got Away




Summer after high school when we first met
We make up in your Mustang to Radiohead
And on my 18th Birthday
We got matching tattoos

Used to steal your parents' liquor
And climb to the roof
Talk about our future
like we had a clue
Never plan that one day
I'd be losing you

And in another life
I would be your girl
We keep all our promises
Be us against the world

And in another life
I would make you stay
So I don't have to say
You were the one that got away
The one that got away

I was June and you were my Johnny Cash
Never one without the other we made a pact
Sometimes when I miss you
I put those records on

Someone said you had your tattoo removed
Saw you downtown singing the Blues
Its time to face the music
I'm no longer your muse

And in another life
I would be your girl
We keep all our promises
Be us against the world

And in another life
I would make you stay
So I don't have to say
You were the one that got away
The one that got away
The o-o-o-o-o-one [x3]
The one that got away

[Bridge:]
A ll these money can't buy me a time machine (Nooooo)
Can't replace you with a million rings (Nooooo)
I shoulda told you what you meant to me (Woooooow)
Cause now I pay the price

And in another life
I would be your girl
We keep all our promises
Be us against the world

And in another life
I would make you stay
So I don't have to say
You were the one that got away
The one that got away
The o-o-o-o-o-one [x3]

And in another life
I would make you stay
So I don't have to say
You were the one that got away
The one that got away