In the formula 20 divided by 4, 20 is (), 4 is (), 5 is (), read as: () stands for ()

In the formula 20 divided by 4, 20 is (), 4 is (), 5 is (), read as: () stands for ()

20 is the divisor, 4 is the divisor, 5 is the quotient, read as 20 divided by 15, that means 20 divided by 4!

A is a real matrix proof: rank (a "a) = rank (a)

It is proved that a ^ tax = 0 has the same solution as AX = 0
Ax = 0, then a ^ tax = 0
A ^ tax = 0, then x ^ TA ^ tax = 0, then (ax, ax) = 0, then AX = 0
So a ^ tax = 0 has the same solution as AX = 0

Sequence 5, 8, 13, 21, 34, 55, 89 The rule is: from the third number, each number is just the sum of the first two numbers, what is the remainder of the number 2012 divided by 5

Fibonacci sequence refers to such a sequence:
1,1,2,3,5,8,13,21……
This sequence starts with the third term, each of which is equal to the sum of the first two terms
Its general formula is: [(1 ＋ 5) / 2] ^ n / √ 5 - [(1 ＋ 5) / 2] ^ n / √ 5 [√ 5 denotes radical 5]
The number 2012 in this question is the number 2016 in Fibonacci sequence
The single digits are: 5,8,3,1,4,5,9,4,3,7,0,7,7,4,1,5,6,1,7,8,5,3,8,1,9,9,8,7,5,2,7,9,6,5,1,6,7,3,0,3,6,9,5,4,9,3,2,5,7,2,0,1,1,2,3
It can be seen that there is a cycle of 60 numbers
2012÷60=33…… thirty-two
Each digit of the 32nd number is 2
So the number 2012 is divided by 5, and the remainder is 2

What's the conversion from 5 feet 9 inches to centimeters

5 feet = 5 × 12 × 2.54
9 inches = 9 × 2.54
Total = 175.26

10 5 7 9 four numbers count 24 points

5*(10-7)+9=24

(-a^2-1/2b)^2 （-3x-2y）（3x+2y） （2a-b ）^2-4（b^2-ab)

(a ^ 2-2-1 / 2b) ^ 2 (A-A ^ 2-2-2-1 / 2b) = (a) \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ ^ 2-2-2-2-2-2-2-2-2-2-1 / 2b-2-1 / 2b-2-2-2-2-2-2-2-2-2-2-1 / 2B / 2B / 2B / 2b-2-2-2-2-2-2-2 / 2B / 2b)) #178; - 4B and#178

A bus, 60 km / h to B, a car, 100 km / h to a
After a few hours, the two cars are 32 kilometers apart. How many kilometers have they traveled?

32/（60+100）=0.2
Bus 0.2 * 60 = 12 km
Car 0.2 * 100 = 20 km

The sum of the two sides of a triangle is 10, and the cosine of its angle is the root of the equation 2x-3x-2 = 0. Find the minimum perimeter of the triangle

Let three sides of triangle be a, B and C;
B + C = 10, the included angle is a. solve the equation 2x square - 3x-2 = 0 to get x = - 1 / 2, x = 2 (rounding off)
So cosa = - 1 / 2. From the cosine theorem, the square of a = 100 BC
Because B + C = 10, when B = C = 5, b * C is the largest, and a is the smallest, that is, the perimeter of the triangle is the smallest, a = 5 * √ 3,
Minimum perimeter = 10 + 5 * √ 3

From Nanjing to Shanghai, car a runs for 4 hours and one for 5 hours. How much faster is car a than car B?

(1/4-1/5)÷1/5x100%=25%

If there are two rational numbers AB satisfying the relation (A-1) × (B-1) < 0, what is the relationship between them and the size of 1? If there are two rational numbers AB satisfying the relation
The formula (A-1) × (B-1) > 0, then they must be greater than one

Not necessarily
Because negative is positive, A-1 can be less than 0  a < 1, and so can B-1