Domain And Range Equations

JakeHunterTX

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Sep 17, 2007
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What is the range of the fuction

f(x) = 1/2x+4
When the domain is { -2,0,2,6 }
 

jwpaine

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Mar 10, 2007
Messages
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Plug the values from your domain into your function to get the outputted "range" of numbers. For every input there should be one output.

Cheers,
John.
 

Subhotosh Khan

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Jun 18, 2007
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JakeHunterTX said:
What is the range of the fuction

f(x) = 1/2x+4
When the domain is { -2,0,2,6 }
I assume your problem looks like:

\(\displaystyle f(x) = \frac{1}{2x+4}\)

for this function (-2) should not be included in the domain - because the function is undefined at x= -2.

By the way, you should write the fuction above as

f(x) = 1/(2x+4) ..... watch those extra parenthesis.

the way you wrote it, that translates to:

\(\displaystyle f(x) = \frac{1}{2} x + 4 = \frac{x}{2} + 4\)....If this is the given problem to be solved, then x = -2 is within the domain
........................................because f(-2) = 3 (defined)
 
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