SOLUTION: Which of the following is the domain of the function G(F(x))? F(x) = x + 6, G(y) =4/(square root)y G(F(x)) =4/(square root)x+6 A. All numbers less than -6 B. All

Algebra ->  Functions -> SOLUTION: Which of the following is the domain of the function G(F(x))? F(x) = x + 6, G(y) =4/(square root)y G(F(x)) =4/(square root)x+6 A. All numbers less than -6 B. All       Log On


   



Question 445223: Which of the following is the domain of the function G(F(x))?
F(x) = x + 6, G(y) =4/(square root)y
G(F(x)) =4/(square root)x+6
A. All numbers less than -6
B. All numbers less than or equal to -6
C. All numbers greater than -6
D. All numbers greater than or equal to -6

Found 2 solutions by swincher4391, stanbon:
Answer by swincher4391(1107) About Me  (Show Source):
You can put this solution on YOUR website!
G(f(x)) means take what is in f(x) and put it into g. If we do this then we get 4%2Fsqrt%28x%2B6%29 So what does it mean for this function to be undefined? We have a couple things we need to worry about. Since this is a rational function (a fraction), we need to worry about dividing by 0. What values make this function have division by 0? Well set x+6 =0. So x = -6. We also cannot have the square root of a negative value. So set x+6 <0. x < -6. Since x cannot equal -6 or even be less than it, then all values greater than -6 is the correct domain.
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Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Which of the following is the domain of the function G(F(x))?
F(x) = x + 6,
Domain of F is "all Real Numbers"
Its Range is also "all Real Numbers"
which are handed on to "G"
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G(y) = 4/(square root(x)
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G(F(x)) = G(x+6) = 4/sqrt(x+6)
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Note: x+6 must be >= 0
x must be >= -6
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Cheers,
Stan H.
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A. All numbers less than -6
B. All numbers less than or equal to -6
C. All numbers greater than -6
D. All numbers greater than or equal to -6