f(x) (????) is a girl group from South Korea signed under SM Entertainment.
"f" stands for "flower", and like a flower, they will blossom. The "x" stands for the female chromosome "xx," as well as standing for a variable, where if the 'x' changes, the result will be different. Which correlates to the members diverse skills and backgrounds, which will allow them to not only flourish in Korea, but by changing their x-factor or variable, they will also succeed overseas.
The special charisma and features of each member:
- Victoria - sexy, feminine charms,
- Krystal - Korean-American, pure, girly charms, younger sibling of Jessica (member of ????, also under SM Entertainment).
- Amber - Chinese-American, sharp, boyish charms
- Sulli - cute and friendly charms
- Luna - feminine and matured charms
From Wikipedia:f(x) (Korean: ????; pronounced /??f ??ks/) is a South Korean girl group formed by SM Entertainment in 2009. The name is a play on the mathematical notation for function, with "f" signifying "flower" and "x" representing the female's double X chromosome. The quintet consists of Victoria, Amber, Luna, Sulli, and Krystal.