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What does ^ mean in mathematics
For example, the 5th power of 2 is usually expressed as 2 ^ 5. (for the operation of the power, see the power) "^" is a bit logic operator ^ - --- XOR is a reversible operator, only in two comparisons
Let Z be equal to 1 + 2I, I be an imaginary unit, Z + Z (with a horizontal line on it)=
It's the conjugate complex of Z, which is 1-2i
What does root mean in mathematics
It's the solution of an equation
Math! 3Q!
The small medicine box is a cuboid with a side length of 5cm and a height of 8cm on the bottom. We plan to pack such 24 small medicine boxes into a large carton. Please design the length, width and height of the large carton, and calculate the surface area of the large carton
The more detailed the better, there is a reward oh!
The bottom area of a small box is 25 square centimeters, and that of 12 boxes is 300 square centimeters. The side length of the bottom is 70 centimeters, the length is 20 centimeters, the width is 15 centimeters, the height is 16 centimeters, and the surface area is 1680 square centimeters,
1. Calculate the ratio of 27:60 8:3:1.7:0.51 1 hour as follows:
2. 4:5 = 10 / 10 = 20 △ () = 8: () = ()
1. Find the ratio of the following ratios 27:60 = 9:20
3 / 8:9 / 20 = 3 / 8x20 / 9 = 5:60
1.7:0.51=170:51=10:3
1 hour: 45 minutes = 60:45 = 4:3
2. 4:5 = 8 out of 10 = 20 (25) = 8: (10) = (0.8)
If the two sides of a triangle are 2 and 5 respectively, and its perimeter is an integer, how many triangles are there
a1 b2 c3 d4
2 4 5
2 5 5
2 5 6
Choose c
Hehe, hope to help me, 3Q
Xiao Fang read 160 pages in the first week, 20% less than that in the second week, and 10% more than that in the third week. How many pages did she read in the third week?
I read it the next week
160 (1-20%) = 200 (pages)
The third week
200 × (1 + 10%) = 220 (pages)
If you answer well, you will get extra points. You'd better copy the questions and answer them at the bottom of the questions,
1、 Judgment questions (mark "√" for right and "×" for wrong)
1. This year's apple output is 15% higher than that of last year, and this year's apple output is 115% of that of last year
2. Put 5g sugar in 100g sugar water, the sugar content of sugar water is 5%, ()
There are 40 boys in class 6 (2). The ratio of boys to girls is 10 to 9. There are 76 students in the class
2、 Application world,
1. After Shenzhou-5 astronaut Yang Liwei left the earth, he lost his center of gravity and lost 52.5kg. His weight was only 10.5kg. What percentage of his weight has been lost
2. The two trains leave from the East and West cities at the same time. It takes 10 hours for car a to go from the east city to the West City, and it takes 8 hours for car B to go from the west city to the east city. After 2.5 hours, the distance between the two trains is 35 kilometers. How many kilometers is the distance between the East and West cities?
3. The people waiting for the bus at the station are lined up neatly, and Xiao Peng is among them. He counts the number of people. The number in front of him is two-thirds of the total number, and the number behind him is one-quarter of the total number. How many people are Xiao Peng in?
Yes
wrong
yes
52.5/(52.5+10.5)X100%=83.3%
35/(1-1/(2.5X(1/10+1/8)))=80
1 / (1-2 / 3-1 / 4) = 12, a total of 12 people
What are the numbers in mathematics
What odd even quotient remainder prime combination or something The more complete, the better. We need concepts and definitions
Real number
Rational number: natural number: 0 and positive number: fraction (true fraction, false fraction) (infinite circular decimal), integer
A negative number
Irrational number: infinite non - cyclic decimal
imaginary number
Common factor, common multiple, prime, composite
Logarithm, reciprocal
Well, are functions? Trigonometric functions
That's all I can think of,
What is the meaning of land number in mathematics?
Land number? It's the base number
In junior high school, the base refers to the base of a power, and the related number also has an exponent. For example, 5 ^ 3 = 125, 5 is the base, 3 is the exponent, and 125 is the power. This kind of operation is called the power
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