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## Main Question or Discussion Point

Hi guys...I am having big trouble finding the range of a function dependant on 2 variables.

The function is D=X1-X2.

R=|D|

How do you find the range of R and D?Is the range of R from 0 to infinity and that of D from - infinity to infinity?

The function is D=X1-X2.

R=|D|

How do you find the range of R and D?Is the range of R from 0 to infinity and that of D from - infinity to infinity?