Incremental distance

Algebra Level 2

The distance between two numbers -2 and 7 on a number line is 7(2)=9,7 - (-2) = 9, as shown above.

Now, we have three numbers a,a2,a3a, a^2, a^3 on a number line, as shown below. If the distance between aa and a2a^2 is 6, what is the distance between a2a^2 and a3?a^3?

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