functions: find domain and range of f(x) = x^2 - 49

gierhame

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Jan 11, 2008
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How do you find the domain and range of the function of x[sup:1khd9uk1]2[/sup:1khd9uk1]-49?
I don't really understand how to do this.
 

gierhame

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Joined
Jan 11, 2008
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Re: functions

I know that i it has something to do with the number 7;
could you explain the process maybe with another problem. I just don't know how to find it with an equation.
 

Mrspi

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Dec 17, 2005
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Re: functions

gierhame said:
I know that i it has something to do with the number 7;
could you explain the process maybe with another problem. I just don't know how to find it with an equation.
I'm a bit confused... you mention an "equation" but I don't see one here.

Do you mean

f(x) = x[sup:2c6u8cwo]2[/sup:2c6u8cwo] - 49


Or do you mean something else.

The domain of a function consists of all values for the independent variable (x, in this case) for which the function definition is meaningful.

If

f(x) = x[sup:2c6u8cwo]2[/sup:2c6u8cwo] - 49

f(x) is defined for ANY real number value of x. No matter what real number you pick for x, x[sup:2c6u8cwo]2[/sup:2c6u8cwo] - 49 has a real number value.
 

Subhotosh Khan

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