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X and y are two different numbers selected from the 500 natural numbers from 1 to 500, and x > y, then the maximum and minimum values of X + YX − y are______ And______ ．
(1) X = 500, y = 499500 + 499500 − 499 = 999; (2) x = 500, y = 1500 + 1500 − 1 = 501499, answer: the maximum value of X + YX − y is 999, the minimum value is 501499
Let X and y be two different numbers selected from 200 natural numbers, and the small number is greater than y. then, divide x + y by the maximum and minimum value of X-Y
M = (x + y) / (X-Y) M = [(X-Y) + (2Y)] / (X-Y) M = 1 + [(2Y) / (X-Y)] m = 1 + 2 × {1 / [(x / y) - 1]} to determine the maximum or minimum value of M, as long as the maximum and minimum values of tangent point X / y. 1
X and y are two different numbers in the natural number of 1-200, and X is greater than y. find the maximum and minimum value of X + y of X-Y
Solve it as soon as possible
The maximum requirement is X-Y as small as possible and X + y as large as possible, so that x = 200, y = 199 and the maximum is 399
The minimum requirement is X-Y as large as possible, x + y as small as possible, so that x = 200, y = 1, and the minimum is 201 / 199
Find the values of natural numbers a, x, y satisfying √ A-2 √ 6 = √ X - √ y
The values of natural numbers a, x, y satisfying radical (A-2 * radical 6) = radical X - radical y are
It is similar to the first and third questions
A-2 radical 6 = (x + y) - 2 radical (XY)
Then a = x + y, xy = 6
So there are several possibilities:
x1y6a7
x6y1a7
x2y3a5
x3y2a5
If x and y are two different natural numbers and 1 / x + 1 / y = 2 / 5, then what is the value of X + y?
(x+y)/(xy)=2/5
5x+5y=2xy
x=5y/(2y-5)
x=3,y=15
X = 5, y = 5, rounding off
So x + y = 18
1 / x + 8 / y = 1, where x and y are two unequal natural numbers, and the sum of these two natural numbers is the minimum, and the product is the maximum. They are?
1 / x + 8 / y = 1, y + 8x = XY, (x-1) (Y-8) = 8, (1). X-1 = 1, Y-8 = 8, x = 2, y = 16, x + y = 18, xy = 32. (2). X-1 = 2, Y-8 = 4, x = 3, y = 12, x + y = 15, xy = 36. (3). X-1 = 4, Y-8 = 2, x = 5, y = 10, x + y = 15, xy = 50. (4). X-1 = 8, Y-8 = 1, X = 9, y = 9, x + y = 18, xy = 81
Which prime numbers and which prime numbers are 1, 3, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9
Prime numbers within 100: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 91, 97
therefore
Prime number: 2,3,13,29,97
Total number: 4,9,39,51,81
1 is neither prime nor composite
The product of multiplication of any two prime numbers must have and only have two four factors
K = P * q (P, q are prime numbers and P is not equal to q)
Then K has (1 + 1) (1 + 1) = 4 factors
If P = q
Then K has three factors
How many factors are there in the product of multiplication of two different prime numbers?
Four, 1, product, two prime numbers
The product of multiplication of two different prime numbers must have four divisors______ ．
The product of multiplication of two different prime numbers has four factors: 1. The product of the two prime numbers and the product of the two prime numbers has four factors. Therefore, the product of multiplication of two different prime numbers must have four divisors. This statement is correct
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