For any two non-zero rational numbers x and y, x4 ÷ y4 is equal to
(a) (x ÷ y)0
(b) (x ÷ y)1
(c) (x ÷ y)4
(d) (x ÷ y)8
(By law of exponent: (a)m÷(b)m = (a÷b)m)
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