Sentence making and explanation of several words 1. Wanzhuan 2. Vigorous 3. Ancient times Make sentences 4. Dawn

Sentence making and explanation of several words 1. Wanzhuan 2. Vigorous 3. Ancient times Make sentences 4. Dawn

Wanzhuan: 1. (speaking) gentle and tortuous (but without losing the original meaning);
I can't write good prose
The arduous and dangerous historical road can only be swept through by the vigorous spirit
Ancient times refers to the long historical period from the appearance of human beings to the formation of a country, that is, primitive society
The sun just came out in the morning

The difference between accuracy of 0.1 and accuracy of 0.1

The accuracy of 0.1 means that the number on the decile is accurate, while the accuracy of 0.1 means that because there are many digits, it is inconvenient to write them one by one, and it has no special meaning for the meaning expressed, so the specific number after the decile can be ignored, as long as the number on the decile is accurate, Its number is also accurate after 0.1. This is the difference between the two

How many parallelograms are there in a 4x5 square

150

Finding the differential of function: y = x ^ 4 + 5x + 6

y'=4x^3+5;
Then dy = (4x ^ 3 + 5) DX

If the constant term of (x-x ^ 2 / 2 root a) ^ 6 expansion is 60, then a is equal to 60

The expanded general term is
C(6,m)*x^m*(-√a/x^2)^(6-m)
Where the exponent of X is m-2 (6-m) = 3m-12
When is a constant term, its exponent is 0
That is 3m-12 = 0
The solution is m = 4
In general terms, there are:
C(6,m)*x^m*(-√a/x^2)^(6-m)=15a
So 15A = 60
That is, a = 4

The denominator of a fraction is 3.75 times of the numerator, and the numerator is 11 times smaller than the denominator___ ．

Let the numerator of this fraction be x, then the denominator is 3.75x. From the meaning of the question, we can know that: 3.75x-x = 11, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 4, then the denominator is 4 × 3.75 = 15, then this fraction is 415; so the answer is: 415

How can we get from this step to the second step?
Step 1: 1 / 2ln │ Y-1 │ = ln │ X-1 │ + C1
Step 2: ln │ Y-1 │ = ln (x-1) ^ 2 + 2C1

It is possible to obtain the true power of the logarithm 2ln (x-1) + 2C1 = ln (x-1) ∧ 2 + 2C1 by multiplying 2

It is known that ab-2 and B-1 are opposite to each other
1 1 1 1
——+——————+——————+… +The value of
ab (a+1)(b+1) （a+2)(b+2) (a+2008)(b+2008)

Ab-2 + B-1 = 0 B-1 = 0b = 1 ab-2 = 0 A-2 = 0A = 21 1 - + - + - - - + +————————ab (a+1)(b+1) （a+2)(b+2) (a+2008)(b+2008) =1/1*2+1/2*3+1/3*4+.+1/2009*2010=1-1/2+1/2-1/3+1...

What is the basis for a multiplication to be written into two division

According to the meaning of division: given the product of two numbers and one of the factors, the operation of finding the other factor is called division. For example () × 2 = 6
Then () = 6 △ 2

Area method in rectangular coordinate system
Given three points P (a, b), m (C, d), n (E, f) in rectangular coordinate system
Find the expression of triangle PMN area!
What is the formula of the distance from the point to the straight line on the fourth floor?

Regardless of the vertex position of a triangle, △ PMN can always be expressed by the sum and difference of the areas of a right angled trapezoid (or rectangle) and two right angled triangles