Math problems, thank you for the answer, write the steps

144 -4 = 36, (divide by (+, 3 4-7 8) divide by (-7 8) = 1 7

Divide 18 by (multiply by 11 14 = 264 14, 4 and 1 5 times of a number is -5, what is this number = -25 21 The product of a number and 1 and 3 20 is -4 and 19 20, find this number = -99 23

4+1/5)x=-5 x=-5/(4+1/5)=-5*5/21=-25/21

Because I was waiting for online banking registration, I was familiar with the keyboard again, and I dared to ask the children what grade they were in elementary school? I hope I am not helping to abuse it, I am afraid of ......I'm afraid of ......I'm afraid of ......

Question 1: 36

Question 2: -500 (only one time for the first two questions is enough).

Question 3: Score in front, (6 8-7 8) (-7 8) = 1 7 Question 4: -18 (

Question 5: Let this number be x, then x*4 and 1 5=-5, i.e. x21 5=-5, x=-25 21

Question 6: Same as above, x*23 20=-99 20 x=-99 23

Here's a quick hint to you.

1。From the meaning of the title, we can see a and b as the two roots of the square socks spring x -3x 1 0, then: a b 3 , a b = 1

Let's do it.

2. This problem is also solved from the relationship between the root and the coefficient, and the discriminant formula of the equation δ=6 -4 3 m 0....

x1+x2＜0...

x1×x2≥0...

It can be solved: m=3.

3. The solution of this question is basically the same as that of the second question.

6-6x-5x+10=4x+6 15x=10x=2/33x-9=5-4+10x

7x=-10

x=-10/7

8x-6-5=18x-12-2x-2

8x=3x=3/8

x/3-1)/4-6+6=0

x/3-1=0

x=36x-3*(x-1)=12-2*(x-2)6x-3x+3=12-2x+4

5x=13x=13/5

1. y=600-10x 20131114 Melon Music Awards EXO is a short film shot by Wolf and Growl for a special stage.

I've searched all over the whole and it's only 100x100 in size, and I can only use AI to enlarge it for you---.

The first question is C.

If we are going to win (or something), we need to be prepared to face it and learn from it.

The second question is C.

I guess I have to find out who or she means.

Question 3: Select A.

The other three are clearly unreasonable. A is to ask how your holiday was.

The bottom is 4cm

Is it the base radius?

The circumference is meters. So the total area = square meters.

A: A total of kilograms of paint are required.

According to s = r

It is obtained: s A: s B = r A : r B = 25: 9s A = 25 9s B.

s A + s B =

s A + s B =

Let the edge length of the small cube be x cm, and the edge length of the large cube be 2x cm.

x³+8x³=25×45

Solution: x=5, 2x=10

The landlord begged for it

Question 1: <>

Answer to question 2: <>

Question 3: Answer sensitively:

Set (1,5) represents a new set by removing element 1 from interval (1,5). Since the interval is an open interval, i.e., it does not contain the endpoint beat, the set still contains all the real numbers in an open interval (1,5) when element 1 is removed, i.e., the set contains an infinite number of elements. Therefore, the option is infinity

1；；a(n)=a(1)+(n-1)*d, so a3=a1+2d=5, s(n)=n*(a(1)+a(n)) 2

S15=(A1+A15) 15 Celery Natomato 2=15(A1+7D)=225, so A1=1, D=2, An=1+2(N-1).

2,, can be suspected to divide the bn into two parts, one part is 2 an, one part is 2n, and calculate them separately.

The first part is a proportional series, the first term is 2, and the common ratio is 2 d=4, so the sum of the first n terms of the first part is a1(1-q n) (1-q).

2（1-4^n）/(1-4)=2/3(4^n-1)

The second part is an equal difference series, the prime minister is 2, and the tolerance is 2, so the sum of the first n terms of the second part is s(n)=n*a(1)+n*(n-1)*d 2=2n+n(solanine n-1)=n 2+n

tn=2/3(4^n-1)+n^2+n

According to the triangle 2 right angle side square = hypotenuse square:

a1d1 squared = 1 + 4 = 5

The square of a2d2 = 5 + 20 = 25

The square of a3d3 = 25 + 100 = 125

The square of a4d4 = 125 + 500 = 625 = the area of the square a4b4c4d4 Note that I didn't write the length of each side, because I can't enter the root number, you can understand it by doing the math.

From the title, we can get the area of the square A1B1C1D1 = the area of the small square ABCD + the area of the 4 small right triangles.

5 = root number 5 * root number 5

The area of the square a2b2c2d2 = the area of the square a1b1c1d1 + the area of the 4 small right triangles.

5+4*1 2*2 root number, 5 * root number, 5 root number

By analogy, the square with the extended side length is 5 times the area before the extension, and their area number is an equal proportional series, the first term is 1, and the common ratio is 5, so s4 = s1*5 cube.

Solution: Initially the side length is 1 and the area is 1, in the right angle cc1d1, cd1=2, cc1=1, then c1d1=5

The side length of the square obtained by extending it once is.

5, the area is 5, the same reason: the length of the extended side is 5, the area is 25, and the fourth side length is 5

5, the area is 125, and so on, when the side length is.

5(n-1), the area of square a10b10c10d10 is: (5

So the answer is: 510

I have seen your diagram and I found that there is a mistake in your thinking, that is, the side length of a1b1c1d1 is 1, then the side length of a2b2c2d2 is not 2, it should be the root number 5 (according to the Pythagorean theorem), and then the side length of a3b3c3d3 is 5 (that is, 5 times more than the previous one), of course, a4b4c4d4 is also 5 times the root number of the previous one, that is, 5 times the root number 5, so the area is 125To summarize the rule: the side length of the latter square is 5 times the root number of the previous one.

Got it? What math problems can you q me 544434325 in the future

1) Because of |pf1|+|pf2|=4, so a=2 should be |f1f2|= 2 root of the rock Tong No. 3

So c = Genzaoling No. Socks Tan 3

b = root number a 2 - c 2 = 1

x^2/4)+(y^2/1)=1

The topic is not clear.

How many degrees is a0b?

It is known that x1 and x2 are the squares of x-4x+1=0 of the two real roots of the unary quadratic equation: x1+x2=4, x1·x2=1

x1+x2)²=4²=16

1/x1 + 1/x2

x1+x2)/(x1·x2)

4∴（x1+x2）²/（1/x1 + 1/x2）=16/4=4

Do what you want, dismiss, do nothing.