Question

f(x) = √5-x ...find its range
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Answer 1

f(x)=x−5

For f(x) to be defined, the term under the Square-root should be greater than or equal to zero.

x−5≥0

x≥5

So, the domain is [5,∞)

Now, for  x−5≥0

x−5≥0

y≥0

So, the range is [0,∞)

solution