Cedric0303 wrote:Given f(x) = x/2 +1

g(x) = x^2 -1

Find gf(x) = g(x) ?

Does "gf" mean "g times f" or "g compose f"? Thanks.

- Fri Mar 06, 2015 6:56 pm
- Forum: Intermediate Algebra
- Topic: gf(x) = g(x) ??
- Replies:
**1** - Views:
**92**

Cedric0303 wrote:Given f(x) = x/2 +1

g(x) = x^2 -1

Find gf(x) = g(x) ?

Does "gf" mean "g times f" or "g compose f"? Thanks.

- Fri Mar 06, 2015 6:37 pm
- Forum: Trigonometry
- Topic: Table calculation doesn't match actual drawing dimensions
- Replies:
**1** - Views:
**60**

annesthetized wrote:How come a calculation worked through trig tables doesn't exactly match the actual drawing dimensions?

Without knowing what the calculations,etc, were, it's hard to say. Maybe round-off error?

- Fri Mar 06, 2015 6:35 pm
- Forum: Trigonometry
- Topic: Alterations to sine wave calculations
- Replies:
**2** - Views:
**179**

...I was wondering if there were any more alterations I could make to this calculation. To explain I've made an image. http://i760.photobucket.com/albums/xx243/i84cookie/sinewaves.png So the top graph shows what a sine wave looks like over time, the bottom shows roughly what I'm trying to achieve u...

- Fri Feb 13, 2015 1:48 pm
- Forum: Geometry
- Topic: Scale position of points in a circle so it looks like a regular scaling?
- Replies:
**1** - Views:
**242**

It doesn't look like P' is half the height of P. Are you maybe scaling the ellipse's height to be half that of the circle, and you're wanting to connect P' on the ellipse to P on the circle?

- Fri Feb 06, 2015 12:04 am
- Forum: Intermediate Algebra
- Topic: Selection the solution and graph the inequality
- Replies:
**4** - Views:
**255**

3/8x - 1/4x < 4/5 (5/32x - 1) I need help in finding the solution. I tried finding LCD and it wasn't helping at all. Please write back showing what you tried so we can see if its wrong or if you were nearly there. When you do, please say if you mean this for your inequality: \dfrac{3}{8x}\, -\, \df...

- Mon Feb 02, 2015 1:44 pm
- Forum: Intermediate Algebra
- Topic: Formulas and Functions problem
- Replies:
**3** - Views:
**305**

Sleepy Ash wrote:I did mean the second one and how did you get the 11 when finding the lowest common denominator?

What did YOU get when you did the factorization to find the LCM of 7, 8 = 2*2*2, 13, 22 = 2*11, and 25 = 5*5?

- Sat Jan 17, 2015 3:36 pm
- Forum: Advanced Algebra ("pre-calculus")
- Topic: Help needed to find domain
- Replies:
**4** - Views:
**371**

f(x) = square root of (2x-6) (the whole expression is under a root, so I had to find (fof)(x)= square root of [2*(square root of (2x-6)) - 6]. So it is root over another root. Please, forgive me if the way I wrote is not clear... Now I have to find Domain of the whole expression Do the regular thin...

- Sat Jan 17, 2015 3:30 pm
- Forum: Advanced Algebra ("pre-calculus")
- Topic: Graph evaluations
- Replies:
**2** - Views:
**485**

I don't understand how evaluate these graphs with the information they gave. The red graph is f(x) and blue is g(x) . http://i84.photobucket.com/albums/k5/Kohleria1/DSC08637_zps6ee38766.jpg http://i84.photobucket.com/albums/k5/Kohleria1/DSC08636_zpsc497dd68.jpg 1. f(g(2)) 2. limit (x => 2 - ) f(x)*...

- Fri Jan 16, 2015 3:21 am
- Forum: Beginning Algebra
- Topic: Domain and Range of a relation
- Replies:
**5** - Views:
**723**

x = y squared I know that D = x > or = 0. I just don't understand why. I also know that R = all real numbers. That one makes sense. Are you working with y as a function of x, or with x and a function of y? Does "D" stand for "domain"? Does "R" stand for "range&quo...

- Thu Dec 18, 2014 12:55 pm
- Forum: Intermediate Algebra
- Topic: Algebraic LCDs
- Replies:
**6** - Views:
**804**

Is "-5/2n+1" (the five being negative only) the same as "-(5/2n+1) [the whole thing with a negative sign in front] Yes. Do the "minus" separately if you're not sure. \dfrac{-5}{2n\, +\, 1}\, =\, \dfrac{(-1)(5)}{2n\, +\, 1}\, =\, (-1)\dfrac{5}{2n\, +\...