Determine the domain of the function. f(x)= sq 7+x

ANSWERS

2015-11-03 12:44:29

The domain of a function is the set of valued x can take on while remaining defined. Assuming the function is purely real (R -> R), you cannot have the square root of a negative value. So any value of x which makes the inside of the square root < 0 must be excluded. Let 7+x = 0 x=-7 Hence the function is undefined (as a real number) when x<-7 Therefore the domain is: {x element R | x>=-7}

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