The positive integers x and y are the two smallest positive integers for which the product of 360 and x is a square and the product of 360 and y is a cube. What is the sum of x and y?8085115165下一题 Next
Question
The positive integers x and y are the two smallest positive integers for which the product of 360 and x is a square and the product of 360 and y is a cube. What is the sum of x and y?8085115165下一题 Next
Solution
To solve this problem, we need to find the smallest x and y such that 360x is a perfect square and 360y is a perfect cube.
First, let's factorize 360. The prime factorization of 360 is 2^3 * 3^2 * 5.
For a number to be a perfect square, all the exponents in its prime factorization must be even. For a number to be a perfect cube, all the exponents in its prime factorization must be multiples of 3.
For 360x to be a perfect square, we need to multiply 360 by a number that will make all the exponents even. The smallest such number is 2 * 5 = 10. So, x = 10.
For 360y to be a perfect cube, we need to multiply 360 by a number that will make all the exponents multiples of 3. The smallest such number is 2 * 3 * 5^2 = 30. So, y = 30.
Therefore, the sum of x and y is 10 + 30 = 40.
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