[計量] GWD27-Q32

[NOWIZKI (殘酷G試煉)]

Q.32 If x^3*y^4=5,000, is y=5?
     (1) y is a positive integer
     (2) x is an integer
Ans. C

But my answer is A, I wanna ask why A alone is not suffcient. THX

--
※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 61.230.15.2