What is the domain of the function y is equal to 2 square root of x minus 6 end root ?

The expression is 2√(x − 6). A square root is defined for real numbers only when its radicand is nonnegative, so x − 6 ≥ 0. Adding 6 gives x ≥ 6, which matches “6 is less than or equal to x, and x is less than infinity.”

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