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Stella [2.4K]
3 years ago
6

1. what are the domain and range of the function?

Mathematics
2 answers:
natta225 [31]3 years ago
7 0

1) domain of the first is ( R ) because of its root(3) and its range is (R) because of its root again

2)and domain of the last , is [0,+infinity)

and for its range , you can draw it such as picture and will be [0,- infinity)

Allisa [31]3 years ago
3 0

Answer:

1. Dom(f)=\mathbb{R}, Ran(f)=\mathbb{R}.

2. Dom(f)=\{x\in \mathbb{R} : x\geq 0 \}, Ran(f)=\{x\in \mathbb{R} : x \leq 0 \}.

Step-by-step explanation:

1. Since the degree of the radical is an odd number, the radicand can be any real number, then x can take any real value, so the domain of f is the set of all real numbers, \mathbb{R}.

Now, if x\in \mathbb{R} , then x-3 \in \mathbb{R}, so  \sqrt[3]{x-3} \in \mathbb{R}, and thus f(x)\in \mathbb{R}, which leads us to affirm that the range of  f  is the set of all real numbers, \mathbb{R}.

2. Since the degree of the radical is an even number, the radicand can not be a negative number, then x can take only nonnegaive values, so the domain of f is the set of all nonnegative numbers, \{x\in \mathbb{R} : x\geq 0 \}.

Now, if x\geq 0 , then \sqrt{x}\geq 0 so  -3\sqrt{x}\leq 0, and thus f(x)\in \mathbb{R}, which leads us to affirm that the range of  f  is the set of all nonpositive numbers, \{x\in \mathbb{R} : x \leq 0 \}.

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