SOLUTION: Please help me. find the domain of each function in interval form: 6sqrt(-4+5x) (which reads the 6th root of -4+5x) 5sqrt(-4+5x) (which reads the 5th root of -4+5x)

Question 917518: Please help me.
find the domain of each function in interval form:
6sqrt(-4+5x)
(which reads the 6th root of -4+5x)
5sqrt(-4+5x)
(which reads the 5th root of -4+5x)
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
OOPS!
I reversed the numbers.
What's inside the root is
so for the 6th root to exist we need
---->
So the interval is
[4/5,infinity).

For the fifth root the answer is still right.

OLD, WRONG ANSWER:
, being an even index root (6 is an even number),
is defined only when what's inside the root is positive or zero,
meaning <---><---> ,
so the domain is

.

, being an odd index root (5 is an odd number),
exists no matter what value takes,
so the domain is

.
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