Q5
If x^3y^4=5,000, is y=5?
(1)y is a positive integer.
(2)x is an integer.
答案是(C), 但是我选(A)
因为5000=5*10^3=(5^4)*(2^3)
(1)若Y是正整数, Y只能是5啊?
例子:
Y=5000
X=1/5000