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Explain what the symbol f(x) means. An example would be appreciated!

Siaff  Nov 23, 2017
 #1
avatar+606 
+3

The symbol f(x) represents a function. 

 

f is the function, x is the input. 

 

f(1) = 3

f(2) = 6

 

You can figure out that the function is times 2

 

f(x) = 2x

 

Here is a function problem:

 

f(x) = ax^2 + bx + c

 

f(0) = 4

f(1) = 15

f(2) = 36

 

What is product abc?

 

Anyone is welcome to answer this problem :)

 

Notes: Function does not have to be f, it could be any letter

 

p(x) or b(x) both work!

 

I hope this helped, 

 

Supermanaccz

supermanaccz  Nov 23, 2017
 #3
avatar+6979 
+1

f(0) = c so c = 4,

f(1) = a + b + 4, implies that a + b = 11, so 2a + 2b = 22 --- (1)

f(2) = 4a + 2b + 4, implies that 4a + 2b = 32 --- (2)

(2) - (1) gives 2a = 10, a = 5.

5 + b = 11, b = 6.

Therefore abc = 4*5*6 = 120.

MaxWong  Nov 26, 2017
 #2
avatar+86919 
+3

The notation is used to denote which function we are referring to on a graph....for instance, we might have the functions f(x), g (x), h(x), etc., on a graph........all are "functions of x".....they all take some x value and return a y value (where they are defined......)

 

 

cool cool cool

CPhill  Nov 23, 2017

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