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Explain whether you think [tex]$\frac{1}{2}$[/tex] is a terminating decimal or not.

Sagot :

To determine if the fraction [tex]\(\frac{1}{2}\)[/tex] is a terminating decimal or not, we need to understand what makes a fraction's decimal representation terminating.

A decimal representation of a fraction is said to be terminating if it has a finite number of digits after the decimal point. For a fraction [tex]\(\frac{p}{q}\)[/tex] where [tex]\(p\)[/tex] and [tex]\(q\)[/tex] are integers, the decimal will terminate if and only if the denominator [tex]\(q\)[/tex], after simplifying the fraction, has no prime factors other than 2 and/or 5. These prime factors relate to the base-10 number system.

Let's analyze [tex]\(\frac{1}{2}\)[/tex]:

1. Simplification: First, we note that [tex]\(\frac{1}{2}\)[/tex] is already in its simplest form – the numerator 1 and the denominator 2 share no common factors besides 1.

2. Prime Factors of the Denominator: For this fraction, the denominator is 2. The only prime factor of 2 is itself, which means the denominator does not have any prime factors other than 2 and/or 5.

Since the denominator 2 only has the prime factor 2, this indicates that [tex]\(\frac{1}{2}\)[/tex] will indeed have a terminating decimal representation.

To confirm, we can perform the division:
[tex]\[ \frac{1}{2} = 0.5 \][/tex]

This is a simple terminating decimal, as it has a finite number of digits after the decimal point (just one digit, in this case).

Therefore, [tex]\(\frac{1}{2}\)[/tex] is confirmed to be a terminating decimal.