What is the competitiveness of a and B

1.

bus line: No.224 → Metro Line 2 → No.500, the whole journey is about 13.5km

1. Walk about 220m from the north courtyard of the campus headquarters of Chang'an University to Nankou station of Wenyi road

2. Take No.224, pass 2 stations, and then reach the provincial Stadium Station (or take No.31)

3. Walk about 160m to the stadium station

4. Take Metro Line 2, pass 7 stations, Reach Weiqu South Station

5, walk about 330 meters, reach Metro Weiqu South Station (xujiazhai) station

6, take No. 500 interval, pass 1 station, reach hejiaying station (also can take No. 4-04)

7, walk about 470 meters, reach Shaanxi Preschool Normal University

2.

What percentage is a higher than B: (a-b) / b × 100%

The denominator is the number or letter after "Bi"

For example,

A is higher than B, (a-b) / b

b is less than a (a-b) / A

extended data

division operation

1. Dividing a number that is not equal to zero is equal to multiplying the reciprocal of the number

When two numbers are divided, the same sign is positive, the different sign is negative, and the absolute value is divided. If you divide zero by any number that is not equal to zero, you get zero

note:

zero cannot be divisor and denominator

Division and multiplication of

rational numbers are reciprocal operations

in the division operation, according to the rule that the same sign is positive and the different sign is negative, the sign is determined first, and then the absolute value is divided. If there is a fraction in the formula, it is usually converted into a false fraction for calculation. If it can't be divided, the division operation is transformed into multiplication operation

3.

The difference number is | 10-20 | = 10

the difference percentage (| 10-20 |) / 10 = 100%

in statistics, the two range difference, quartile difference, mean difference and standard deviation all belong to the absolute difference number. This difference quantity has the same unit as the original data, which can be used to compare the size of the two differences

However, when the units of two kinds of data are different, or although the units of data are the same, but the average is quite different, the absolute difference is still used for comparison, and the result is often unreliable

The

< H2 > extended data

is often used to compare the relative differences between the two aspects

The first is the measurement of different quality, such as the comparison of the variation size of height and weight, which can not be directly used as the standard deviation, because the two measurement units are different, but the coefficient of variation should be calculated according to their respective mean and standard deviation before comparison

In this case, the standard deviation of the sample with larger average is also larger, and the standard deviation of the sample with smaller average is also smaller, so the standard deviation can not be directly used to compare the size of variation. For example, although children's height and alt's height are expressed in length units, there is a big difference in the average and standard deviation between the two samples

4. Of course, the difference number is the difference between a and B
that is, the absolute value | A-B |
and to calculate the difference percentage, the first thing is to determine the base number,
that is, with which difference,
the difference percentage with a is | A-B | / a
× 100%
similarly, the difference percentage with B is | A-B | / b
× 100%

5. Let C be x
then B is (1 + 0.2) x
A is 1.2 (1 + 0.2) x = 1.44x
so a is 44% more than C

6. It should be said that,
for example: 9 and 5, how much has 9 increased to 5, what is the growth rate,
increased by 9-5 = 4, the growth rate is 4 / 5.
if asked, how much has 5 increased to 9, what is the growth rate,
increased by 5-9 = - 4, the growth rate is - 4 / 9

7. The left and right sides of the two formulas are divided into 53.6/53 = B ^ 2.8, B = 1.004028505, and then a = 27.45511409

8. Unknown_Error

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10.

a³+ b³=( a+b)(a²- ab+b²)

a³- b³=( a-b)(a²+ ab+b²)

(a+b)³= a³+ 3a² b+3ab²+ b³

(a-b)³= a³- 3a² b+3ab²+ b³

The power operation of < H2 > extended data

cubic exponent 3 represents the proct of three identical numbers. Cube is also called cubic. The multiplication of three identical numbers is called the cube of this number. For example, 5 × five × Five is called the cube of five, 53

cubic difference a & # 179- b³=( a-b)(a²+ ab+b²)

cube and a & # 179+ b³=( a+b)(a²- ab+b²)

complete cubic formula (a + b) & # 179= a³+ 3a² b+3ab²+ b³