SOLUTION: for which values of the variable does the expression make sense? √2x-4

Question 1201049: for which values of the variable does the expression make sense?
√2x-4
Answer by ikleyn(52818) (Show Source): You can put this solution on YOUR website!
.


If your expression is  ,  then the necessary condition for the expression
to be defined over the real numbers is this inequality

    2x - 4 >= 0,


saying that the radicand is non-negative.


From this inequality, you have  

    2x >= 4  and further  x >= 2.


It is the ANSWER.

Solved.

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