SOLUTION: f(x) = (x+1)^3/4 For the function f, defined above, what are all the values of x for which f(x) is a real number? Answer for this is x >= -1 Would like to have an explanation

Question 937340: f(x) = (x+1)^3/4
For the function f, defined above, what are all the values of x for which f(x) is a real number?
Answer for this is x >= -1
Would like to have an explanation for this answer.
Answer by MathLover1(20855) (Show Source): You can put this solution on YOUR website!

...as you can see, the radicand is and if radicand is greater or equal to zero solution will be a real number
so, it will be equal to zero if =>-first solution that is real number, and all solutions that are real number will be if
answer: the values of for which f(x) is a real number

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