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How can I determine the value of x that will make the expression a real √x-1
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2 votes
How can I determine the value of x that will make the expression a real
√x-1

User Ephedra
by
7.9k points

1 Answer

2 votes
The content of the square root must be greater than or equal to zero. Determine the conditions on x that make this true.

As written, you require
.. x ≥ 0

If you intend
.. √(x -1) ∈ ℝ
Then
.. x -1 ≥ 0
Solve this inequality by adding 1.
.. x ≥ 1
User Bronsoja
by
7.2k points
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