Question 1112126
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According to  https://www.mathgoodies.com/lessons/vol8/range


<pre>
    The range of a set of data is the difference between the highest and lowest values in the set. 
    To find the range, first order the data from least to greatest. Then subtract the smallest value from the largest value in the set.
</pre>

According to this definition and instructions, the range under the question is this segment [x,x+4].