A math problem that I ve thought about for a long time, and I want to ask a math problem

Because of infinity.

I thought about this question when I was in junior high school, and that's what my teacher said.

You use a calculator to calculate the same result.

Multiplying by 3 equals 1

If the volume of the pool is x, the water velocity of each water pipe is: A: x 36; B: x 24; C: x 18;

If three water pipes are opened at the same time, then.

The current water inlet rate is x 36+x 24+x 18;

Then time t=x [36+x 24+x 18]=8

A: 8 hours.

Let's assume that there is water as 1, so the velocity of A is 1 36, the velocity of B is 1 24, and the velocity of C is 1 18, and 1 A + B - C is the time sought.

Set the time to x, according to the title, get.

1/36+1/24-1/18)*x=1

Solution. x=72

8 hours. A bets 1 36 per hour

B per hour Note 1 24

C per hour note 1 18

So the number of hours required = 1 (1 36 + 1 24 + 1 18) = 8

It is not equal to 1 3, but approximately equal to 1 3

So multiplying by 3 is also approximately equal to (1 3 times 3 by 3 1).

loop) is equal to 1, which is a limit!!

and 1 by an infinite number of 0s), less than any definite arbitrarily small number, the limit is 0!!

1 36 per hour of a single A pipe, 1 24 per hour of a single B pipe, and 1 18 of a single C pipe per hour of a single C pipe

Open the hourly filling pool: 1 36 + 1 24 + 1 18 = 1 8

So it takes 8 hours.

I don't have a pen here, so please calculate it yourself.

Summary. Substituting x=b into -2x=ab+b-2b=ab+bab+3b=0(a+3)b=0 When b=0, a can be arbitrary, and when b≠0, a=-3

If this question is done using the commutation method, can it be done?

Dear, is this the original question?

No, I just wanted to ask.

2x=ab+bx=-(ab+b) 2 This can be solved directly without commuting.

So can the value of b be found?

Substituting x=b into -2x=ab+b-2b=ab+bab+3b=0(a+3)b=0 When b=0, a can be arbitrary, and when b≠0, a=-3

Dear, the exchange here is to directly substitute x=b into -2x=ab+b, you can.

Dear, there are two unknowns here, and you can't find b directly

a+3)b=0 Is this a factorization?

Here b is the common factor.

In the title x=b, it means that b is definite.

B can be thought of as a constant, i.e., the common part.

a+3)b=0 can be factored.

Substituting x=b into -2x=ab+b-2b=ab+bab+3b=0(a+3)b=0 When b=0, a can be arbitrary, and when b≠0, a=-3

B here is the public part, but it is also discussed on a case-by-case basis.

Dad was born in a leap year, because there is only one leap every four years, so Dad had a birthday in 2007, and it happened to be his 12th birthday, Daddy's birthday was February 29, and Dad was 48 years old

Dad's birthday is February 29th, because it is a run every four years, so Dad's age is 12 4=48

1. The total number of blocks of sugar is a prime number less than 50, and the sum of its digits is 11, then this number may be Let Xiaoying be x block, then Xiaohong is x+13, Xiaoliang is 2*(x+13) Assume 1: x+x+13+2*(x+13)=29

Solving the equation yields: x = does not conform to the hypothesis 2: x + x + 13 + 2 * (x + 13) = 47

Solve the equation to obtain: x=2 Xiaoying: 2 pieces of Xiaohong: 2+13=15 pieces of Xiaoliang: 2*15=30 pieces.

It works! If you think about it, the midpoints of the four sides of a square are connected and they are still rectangular (square)!

Take the center of the rectangle, make a straight line and intersect the two sides, make a circle with the diameter of this line and have two intersection points on the other two sides, and connect these four points as a rectangle.

Draw a rectangular ABCD. (AB connects EO and extends the intercourse CD at point F.)(OE=OF).oego=eo, prolonging go to cross bc at point hthen go=ohIn summary, og=oe=oh=ofSo quadrilateral.

EHFG is rectangular.

732×7=5124

The single digit of the quotient is 4, and multiplied by 7, the mantissa is 4, and there is only 2.

If the quotient is 5 in the 10,000 place, then the hundredth digit of the multiplier can be either 7 or 8.

It's not difficult, the one in the upper right corner is 2, and nothing else is right, and you will know this.

Hello, first of all, if you are a student, it depends on what level your grades are, if it is an intermediate level, mathematics scores are very important to improve the total score, basically you want to enter the forefront must at least not lag behind in mathematics, so to improve your proficiency, see the question needs to think about it means that there are too few questions to usually do, now at least 70% of the exam is below medium difficulty, you need to exercise to see what is the test, basically do not have to think.

The actual weight of the egg is xkg.

According to the title, it can be seen that the ratio of the actual mass of the basket to the quality of the basket claimed by the stall owner = the ratio of the actual mass of the eggs to the mass of the eggs claimed by the stall owner.

x/10=(x+

The solution yields x= (kg).

So the actual weight of the egg is.

How did you learn it, and you can go to university if you study it like this. I didn't learn the formula well.