Look at several examples of rational numbers in the form p
q
(q ≠ 0), where p and q are
integers with no common factors other than 1 and having terminating decimal
representations (expansions). Can you guess what property q must satisfy?
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3
Answer:
p/q( q ≠ 0) if q=0 then the division is not defined
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7
The decimal representation will be terminating, if the denominators have factors 2 or 5 or both.
Therefore, p/q is a terminating decimal, when prime factorization of q must have only powers of 2 or 5 or both.
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