Exercise1:Find all pairs of positive integers (x;y) satisfy the equation:

1!+2!+3!+.......x!=y²

CÁC BẠN GIẢI HỘ MÌNH BẰNG TIẾNG ANH NHÉ

Exercise1:Find all pairs of positive integers (x;y) satisfy the equation:

1!+2!+3!+.......x!=y²

CÁC BẠN GIẢI HỘ MÌNH BẰNG TIẾNG ANH NHÉ

Find all pairs of positive integers (x;y) satisfy the equation: 1!+2!+3!+.......x!=y²

(HOMC2017) How many pairs of positive interger (x,y) are ther those satisfy the identity 2^x-y^2=1? Các​ bạn​ trình​ bày​ bằng​ tiếng​ Anh giúp​ mình​ nhé​!!!

Number 6 is written as sum of two positive integers in three different ways: $6=1+5=2+4=3+3.$ (order does NOT matter). That is, there are exactly three different pairs of positive integers that add to make six. How many pairs of positive integers that add to make 1000?

Các bạn giải nhanh giùm mình nhé để mình con đi thi

Suppose that x, y, z are  positive integers such that x > y > z > 663 and x, y, z  satisfy  x + y + z = 1998 and 2x + 3y + 4z = 5992.       Find x, y, z

Number 6 is written as sum of two positive integers in three different ways: $6=1+5=2+4=3+3.$ (order does NOT matter). That is, there are exactly three different pairs of positive integers that add to make six. How many pairs of positive integers that add to make 1000?

Câu hỏi tiếng ANH :

If the sum of all the digits in each of two consecutive positive integers are both exactlt multiple of 5. Then what is the least sum of these two integers ?

A. 99     B. 999     C. 9999     D. 99999

The sum of 2 positive integers a;b ends with 5.Find the last digit of the number a x b x (a + b).Dịch dùm mik nha!