- Thread starter gierhame
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I'm a bit confused... you mention an "equation" but I don't see one here.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.

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.

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for a quick review with worked out examples - go to:gierhame said:How do you find the domain and range of the function of x[sup:2dj28g1d]2[/sup:2dj28g1d]-49?

I don't really understand how to do this.

http://www.purplemath.com/modules/fcns2.htm