One math question

LilyJune

if y and n are positive integers, 450y=n^3, which of the following must be true

1. y/(3*2^2*5)

2. y/(3^2*2*5)

3. y/(3*2*5^2)

LilyJune

how do you get Y的因子必然含有2个2, 一个3,一个5.

dbearwanger

选1.

450y=2*3^2*5^2*y=N^3

所以Y的因子必然含有2个2, 一个3,一个5