[求助]gwd-11-7

sanpao

Q7:

If y is the smallest positive integer such that 3,150 multiplied by y is the square of an integer, then y must be

A. 2

B. 5

C. 6

D. 7

E. 14

given answer e) ???

i did: 3*150=3*(2*3*5*5)

answer is a)

不知正确何解?

mikejia

3150不等于3*150

sammen

3150=5x5x3x3x14