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LUCKY_DIMON [66]
3 years ago
11

Please help. Which function has the domain x>=-11

Mathematics
2 answers:
ra1l [238]3 years ago
5 0

we proceed to resolve each case to determine the solution

we know that

The radicand is a number or quantity from which a root is to be extracted

In this problem the radicand must be greater than or equal to zero

<u>case A</u> y=\sqrt{x+11} +5

the radicand is equal to

(x+11)

so

(x+11) \geq 0\\x \geq -11

the domain is the interval--------> [-11.∞)

therefore

the function  y=\sqrt{x+11} +5 is the solution of the problem

<u>case B</u> y=\sqrt{x-11} +5

the radicand is equal to

(x-11)

so

(x-11) \geq 0\\x \geq 11

the domain is the interval--------> [11.∞)

therefore

the function  y=\sqrt{x-11} +5 is not the solution of the problem

<u>case C</u> y=\sqrt{x+5}-11

the radicand is equal to

(x+5)

so

(x+5) \geq 0\\x \geq -5

the domain is the interval--------> [-5.∞)

therefore

the function  y=\sqrt{x+5} -11 is not the solution of the problem

<u>case D</u> y=\sqrt{x+5}+11

the radicand is equal to

(x+5)

so

(x+5) \geq 0\\x \geq -5

the domain is the interval--------> [-5.∞)

therefore

the function  y=\sqrt{x+5}+11 is not the solution of the problem

the answer is the function y=\sqrt{x+11} +5

EastWind [94]3 years ago
3 0
Answer: Choice A

Set the radicand (stuff under the radical) greater than or equal to 0. Solve x+11 >= 0 for x to get x >= -11
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