At the 2008 Beijing Olympic Games, the Chinese national anthem sounded again and again, which made the Chinese feel extremely proud and proud. How do you feel when you hear the national anthem sounded This is a composition of more than 300 words

At the 2008 Beijing Olympic Games, the Chinese national anthem sounded again and again, which made the Chinese feel extremely proud and proud. How do you feel when you hear the national anthem sounded This is a composition of more than 300 words

When the "National Anthem" rings - Speech friends, how do you feel when the heart shaking "National Anthem" rings? I am always full of emotion and blood. Yes, we are a nation "unwilling to be slaves"; we are a nation "united as one"; we are a nation "brave the enemy's fire"

The Great Wall is the pride of millions of Chinese people?

The Great Wall is one of the proud buildings of thousands of Chinese people

Let XYZ be a three digit number with x > Z. if ABC = XYZ ZYX, then ABC + CBA=______ ．

Because ABC = XYZ ZYX, then ABC = (100x + 10Y + Z) - (100z + 10Y + x) = 99x-99z = 99 (x-z); and ABC is still a three digit number, so 99 < 99 (x-z) < 1000, x-z can take integer values 2, 3, 4, 5, 6, 7, 8. ABC can take values of 198297 The corresponding CBA is 891792 Then ABC + CBA = 198 + 891 = 297 + 792 = =1089, so the answer is: 1089

Let the random variable x obey the exponential function of parameter λ = 1, and find the probability density of y = LNX

As shown in the picture, if you are not clear, please ask. If you are satisfied, please evaluate in time. Thank you!

What is the meaning of inv function in MATLAB? Can you give an example?
Another example is "X", where x plus an apostrophe represents the inverse matrix?
thank

Inv is the inverse matrix. X 'is the matrix transpose

A rectangular steel plate is seven eighths of a meter long and one eighth less in width than in length,

7 / 8 × (1-1 / 8) = 49 / 64M, so the width is 49 / 64M
7 / 8 × 49 / 64 = 343 / 512 square meters
A: the area is 343 / 512 square meters

The area of the large parallelogram in the right figure is 48 square centimeters. A and B are the middle points of the upper and lower sides. Can you find out the area of the small parallelogram in the figure?
The picture is here

24 square centimeters
Connect AB and prove that four triangles are congruent triangles

How to turn a quadratic function to a vertex
Y = ax ^ 2-dx + C
Y = ax ^ 2-dx-c
For example, the vertex of y = ax ^ 2 + DX + C is a (x + D / 2a) ^ 2 + 4ac-d ^ 2 / 4A
His symmetry walk is - (D / 2a) in the vertex test, D / 2a is a positive number, how can it become a negative number when changing the symmetry axis

The derivation of vertex formula is as follows
y=ax²+bx+c=a[x+b/(2a)]²-b²/(4a)+c
When x + B / (2a) = 0, y has a minimum value, where x = - B / (2a), y = C-B & sup2; / (4a)

No matter what the value is, the square 4x-1 of cubic 2x of polynomial X and the value of X (square MX + n) + 2 (mx-2 / 1) are equal. Find the root n of m-3

If the values of two polynomials are equal, there is an equation:
x³-2x²-4x-1=x(x²-mx+n)+2(mx-1/2)
x³-2x²-4x-1=x³-mx²+nx+2mx-1
x³-2x²-4x-1=x³-mx²+(2m+n)x-1
Two polynomials are identical, each of which corresponds to the same term
-m=-2
2m+n=-4
By solving the equations, M = 2, n = - 8
M-3 radical n = 2-3 radical-8
=2-(-2)
=2+2
=4

If you subtract 2 cm from the length of a rectangle, its area will be reduced by 8 square centimeters. If you increase 3 cm in width, it will become a square. The original area of this rectangle is () square centimeters

The original length and width are 7 and 4 respectively, and the area is 28;