In the statement X \le 10, which of the following is an example of a variable?

Question

BlackTom AI · Accepted Answer

As we parse the statement X ≤ 10, the focus is on identifying which item among the options represents a variable rather than a constant or a symbol.
Option a: X. This is the only element that can take on many values and is not fixed, which is exactly what a variable represents in algebraic contexts.
Option b: 10. This is a numeric constant; it does not vary and therefore is not a variable.
Option c: ≤. This is a relational operator meaning 'less than or equal to'; it expresses a relation between quantities but is not something that can vary itself.
Option d: X ≤ 10. This is a compound statement combining a variable with a constant using a relation; it is a proposition about values, not a single variable itself.
In summary, the distinctive feature of a variable is its ability to take on different values, which applies to X but not to the other tokens in the list.

In the statement X \le 10, which of the following is an example of a variable?单项选择题

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