# What is F x and G x?

**f**o

**g**)(

**x**)", which is pronounced as "

**f**-compose-

**g**of

**x**". And "(

**f**o

**g**)(

**x**)" means "

**f**(

**g**(

**x**))". That is, you plug something in for

**x**, then you plug that value into

**g**, simplify, and then plug the result into

**f**.

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Simply so, what is difference between F x and G x?

**g**(**x**) just identifies a function of **x**, **in the** same way as that **f**(**x**) does. Using a "**g**" instead of an "**f**" only means the function has a different label assigned to it. Typically this is done where you have already got an **f**(**x**), so creating another one would be confusing.

Subsequently, question is, what does F x mean in math? A special relationship where each input has a single output. It is often written as "**f**(**x**)" where **x is the** input value. Example: **f**(**x**) = **x**/2 ("**f** of **x** equals **x** divided by 2") It is a function because each input "**x**" has a single output "**x**/2": • **f**(2) = 1.

Correspondingly, does G x mean X?

**g**(**x**) =2x or h(**x**) =2x,,,,,**mean** the same thing,,,except the axis is now **g**(**x**),,or h(**x**). The advantage of using functional notation is that different items can be differentiated, and still shown to be a function of **x**.

What is G in G x?

This is written as "( **f** o **g**)(**x**)", which is pronounced as "**f**-compose-**g** of **x**". And "( **f** o **g**)(**x**)" means " **f** (**g**(**x**))". That is, you plug something in for **x**, then you plug that value into **g**, simplify, and then plug the result into **f**.