2010
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f(x) (/ ˌ ɛ f ˈ ɛ k s /; Korean: 에프엑스; RR: Epeuekseu) is a South Korean girl group, consisting of Victoria, Amber, Luna, Krystal, and previously Sulli until her departure from the group in August 2015.
f (x) (에프엑스) was a South Korean girl group that in the last part of their career consisted of 4 members: Victoria, Amber, Luna, and Krystal. f (x) debuted on September 5th, 2009 under SM Entertainment.
f(x) "f(x) = ..." is the classic way of writing a function. And there are other ways, as you will see!
The f is just a way for you to know that when you see f(x) to treat it as a function and not mistakenly treat it as multiplying one variable by the other (it DOES NOT mean f multiplied by x). It does not have to be an f, it can be any symbol and using different symbols such as h(a) helps differentiate one function from another.
f(x) just means "a function in terms of x" and it is the same as y, except f(x) is a function and must have only 1 y-value for each assigned x-values (in other words it must pass the "line test").
f (x) 에프엑스 '4 Walls' MV. 48,442,447 views 8 years ago. f (x)’s 4th album “4 Wall” and the music video of their lead track “4 Walls” have been released. Listen and download on ...
Jan 21, 2014 · The graph of $f(-x)$ is the mirror image of the graph of $f(x)$ with respect to the vertical axis. The graph of $-f(x)$ is the mirror image of the graph of $f(x)$ with respect to the horizontal axis. A function is called even if $f(x)=f(-x)$ for all $x$ (For example, $\cos(x)$).
