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Question
For a non-zero integer x, x7 ÷ x12 is equal to ______.
Options
x5
x19
x–5
x–19
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Solution
For a non-zero integer x, x7 ÷ x12 is equal to x–5.
Explanation:
Using law of exponents,
am ÷ an = (a)m – n ...[∵ a is non-zero integer]
Similarly, x7 ÷ x12 = (x)7 – 12 = (x)–5
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