Among all natural number pairs (a,b) satisfy (a+5)(b-3)=15. One pair has the greatest product. What is this product?
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Câu 9:
Among all natural number pairs satisfy
, one pair has the greatest product. What is this product?
- Vì : \(a\in N\Rightarrow a+5\in N\)
- Vì : \(b\in N\Rightarrow b-3\in N\left(b-3\ge3\right)\)
\(\Rightarrow a+5\) và \(b-3\inƯ\left(15\right)\)
Mà : \(Ư\left(15\right)=\left\{1;3;5;15\right\}\)
Mà : \(b-3\ge3\)
Nên ta có bảng sau :
| a + 5 | 5 | 15 |
| b - 3 | 3 | 1 |
| a | 0 | 10 |
| b | 6 | 4 |
Vậy các cặp số (a;b) là : (0;6) ; (10;4)
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Câu 1:A is a set of multiples of 12 less than 12. How many elements does the set A have?Answer: The set A has element(s)Câu 2:Find the remainder when is divided by 9.Answer: The remainder is Câu 3:Find the remainder of when it is divided by 3.Answer: The remainder is Câu 4:A is the set of factor of 12 more than 6. How many elements does the set A have?Answer: The set A has element(s)Câu 5:Find the natural number so that the product of and 5 is a prime number.Answer: Câu 6:Given that . How...
Đọc tiếp
Câu 1:
A is a set of multiples of 12 less than 12. How many elements does the set A have?
Answer: The set A has element(s)
Câu 2:
Find the remainder when is divided by 9.
Answer: The remainder is
Câu 3:
Find the remainder of when it is divided by 3.
Answer: The remainder is
Câu 4:
A is the set of factor of 12 more than 6. How many elements does the set A have?
Answer: The set A has element(s)
Câu 5:
Find the natural number so that the product of and 5 is a prime number.
Answer:
Câu 6:
Given that . How many divisors does the number A have?
Answer: The number A has divisors.
Câu 7:
Given that . How many divisors does the number A have?
Answer: The number A has divisors.
Câu 8:
How many prime numbers less than 10 are there?
Answer: There are numbers.
Câu 9:
Find the greatest 2-digit number that has 12 divisors.
Answer: It is
Câu 10:
Among all natural number pairs satisfy , one pair has the greatest product. What is this product?
Answer: The greatest product is
Theo tớ thì cậu nên đăng câu này ở mục hỏi toán bằng tiếng anh !
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The greatest 2-digit number that product of all its digits is 6 is:?
Find the natural number so that the product of and 5 is a prime number.
Tìm số tự nhiên vì thế sản phẩm và 5 là số nguyên tố.
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The sum of the digits of a ten-digit number is epual to 9.What is the product of the digits of this number?
It actually this
1+1+1+1+1+1+1+1+1+0=9
So
1x0=0
Tk plz
thanks
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bằng 0
bạn nhé
tk nhé@@@@@@@@@@@@@@@@@@@@@@@@
LOL
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Find the greatest 3 - digit number such that the product of its digits is 432 ?
986 bạn nhé !
Nhớ k cho mình nhé ! Thank you very much !
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Given three consecutive even natural numbers, which have the product of last two numbers is 80 greater than the product of first two numbers.
Find the largest number.
Answer: The largest number is ............. .
ở đây chỉ hỏi đáp toán,đố vui chứ ko cs hỏi tiếng anh ở đây !!!!!!!!
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Find the greatest 3 digit number such that the product of its digits is 432
Anh lớp 8
Thi rồi 300 điểm .
Số 986 nha em .
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What is the smallest even number such that it is the product of 9 and a number?
