If several true fractions are multiplied, the result must be better than 1______ (fill in "big" or "small")

If several true fractions are multiplied, the result must be better than 1______ (fill in "big" or "small")

According to the analysis, if several true fractions are multiplied, the result must be smaller than 1. For example, 12 × 13 × 34 = 18, 38 is less than 1

1. When a driver ran away from the scene after a car accident, the first witness remembered that the first two digits of the license plate number were the same, and the last two digits were also the same; the second witness was a mathematician, who saw that the license plate number was a complete square of four digits. Try programming to calculate the license plate number of the car causing the accident
2. There are 17 people in a circle, starting from the number 0, and those who report the multiple of 3 leave the circle, and then count again until there is only one person left. Ask the number of the person's original position
3. Write a program to find the transpose matrix of 3x4 array. Read in the main function and transpose the matrix in the change function

The answer to the first question is 7744. Just judge whether you can square it completely
The second problem I don't know should be to use the touch operation to traverse again

High level language programming problems
After executing x = (a = 3, B = a --)
x. The values of a and B are as follows

x=3
a=2
b=3

On the blackboard, there are 50 numbers of 1, 2, 3 and 4.50. Each time you erase two numbers arbitrarily, and then write the sum of the two numbers minus 1. After n times
There will only be one number left on the blackboard. What's the number?

1226

On the combustion of sodium in air in senior one
When sodium burns in air, it first melts and then burns, and the final product is Na2O2
This sentence is correct
I have two questions: 1. When sodium burns in air, why does it melt first and then burn? What is the process?
2. Is the final product only Na2O2? Does sodium not react with CO2?
Thank you for your answers!

Because the melting point of sodium is relatively low at 97.82 ℃, sodium first melts and then burns. Sodium reacts with oxygen to form sodium oxide or sodium peroxide. In the middle stage, sodium oxide reacts with oxygen to form sodium peroxide. A small part of sodium oxide reacts with water and carbon dioxide in the air to form sodium carbonate and sodium hydroxide ...

If the base and area of a triangle and a parallelogram are equal, what is the ratio of their heights

Let the height of triangle be XM
5 = 15x
The solution is x = 5.2
A: the height of the triangle is 5.2m

13, 11, 6, 1 is 24, help

(13*11+1)/6

Given that x = - 5, the value of (x + 2) ^ 2 under the root sign - the value of (x-1) ^ 2 under the root sign is - 3
But I think there's more than one answer. Aren't all the numbers that have a root sign positive or negative? (except 0), so there are two numbers from the first root sign and two numbers from the second root sign
Why take the absolute value?

The number opened by the root sign must be a positive number. If you want to express a negative number, you should call a negative sign in front of the root sign. For example - root sign 5 and + root sign 5
For example:
There are only two solutions when x ^ 2 = 4
I don't know if you're giving me rumors

Known: as shown in the figure, in rectangular ABCD, e is a point on DC, BF ⊥ AE is at point F, and BF = BC, prove: AE = ab

It is proved that the ∵ quadrilateral ABCD is a rectangle, ∵ BC = ad, DC ∥ AB, ∥ d = 90 °, ∵ DEA = ≌ fab, ∵ BF = BC, ∥ ad = BF. In △ ade and △ BFA, ≌ DEA = ≌ Fab ∥ d = ∥ bfaad = BF, ≌ AE = ba

If the square - (1-m) x + M = 0 of the quadratic equation MX with X as the unknown has two real roots that do not want to be equal, then the value range of M is

Because there are two real roots that don't want to wait
So B ^ 2 - 4ac > 0
(1-m)² - 4m² >0
(1-m-2m)(1-m+2m)>0
(3m-1)(1+m)