Question:
For a non-zero integer x, x7 ÷ x12 is equal to:
(a) x5
(b) x19
(c) x-5
(d) x-19
Solution:
(c) x-5
Explanation: x7 ÷ x12 = x7-12 = x-5
(By the law of exponents: am ÷ an=am-n)
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