Find -f(x) for:

(a) f(x) = 3 - x

(b) f(x) = 1/x

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- Jan 19th 2007, 02:07 PMsymmetryFind -f(x)
Find -f(x) for:

(a) f(x) = 3 - x

(b) f(x) = 1/x - Jan 19th 2007, 02:09 PMCaptainBlack
- Jan 19th 2007, 07:32 PMsymmetryRon
Ron,

The question is exactly as appeared in the math book. I'm sure it is another plug and chug, right?

I just get confused by the negative in front of f(x). See it?

What do I do in this case?

Thanks! - Jan 20th 2007, 04:58 AMtopsquark
What does it mean when you have "-3" for example? I think some of the problem here is in the way you are looking at "f(x)." In the context you are looking at it f(x) is just a (probably real) number. So the negative sign is the same as it is in any other context when applied to a number.

-Dan - Jan 20th 2007, 06:46 AMsymmetryok
Let's see:

-f(x) applied in f(x) = 3 - x

Becomes 3 - (-x) = 3 + x, right?

Or, is it - 3 + x?

Or maybe - 3 - x? - Jan 21st 2007, 05:19 AMtopsquark
- Jan 21st 2007, 05:48 AMsymmetryok
Okay...the negative sign in front of the function (-f(x)) affects the whole function.

Now it is very clear.

Thanks!