Go to first unread
Back
to top
Maths - what does f(x) mean?
Watch
Announcements
I need to know what f(x) means and why we use it in maths? I'm really stuck.
Thanks in advance
Thanks in advance
0
reply
Report
#2
'function of x'
f(x) basically means y, and f'(x) means dy/dx
The x can have a value, so for example, f(x) = 2x + 1, then f(1) = 3
that is as good as I can explain it!!!
f(x) basically means y, and f'(x) means dy/dx
The x can have a value, so for example, f(x) = 2x + 1, then f(1) = 3
that is as good as I can explain it!!!
3
reply
Report
#5
(x) is the basic equation of the graph, say, x² + 4x +4.
The F is what you are doing to it, eg translating it up 2, or stretching it etc. There are equations for this but I've forgotten them!
The F is what you are doing to it, eg translating it up 2, or stretching it etc. There are equations for this but I've forgotten them!
0
reply
Report
#6
(Original post by gordon2002)
'function of x'
f(x) basically means y, and f'(x) means dy/dx
The x can have a value, so for example, f(x) = 2x + 1, then f(1) = 3
that is as good as I can explain it!!!
'function of x'
f(x) basically means y, and f'(x) means dy/dx
The x can have a value, so for example, f(x) = 2x + 1, then f(1) = 3
that is as good as I can explain it!!!
0
reply
Report
#7
remember the little function boxes you did when you were like 10. x goes in, f(x) comes out. the function could be, say, adding 5, dividing by two... whatever.
1
reply
Report
#8
(Original post by heninacoop)
(x) is the basic equation of the graph, say, x² + 4x +4.
The F is what you are doing to it, eg translating it up 2, or stretching it etc. There are equations for this but I've forgotten them!
(x) is the basic equation of the graph, say, x² + 4x +4.
The F is what you are doing to it, eg translating it up 2, or stretching it etc. There are equations for this but I've forgotten them!
The letter within the brackets is the variable. You can have multiple variables too, like f(x,y), H(x,y,t) or anything you like really (but not repeated letters!).
1
reply
Report
#9
f(x) is the gradient function isnt it? you use it to find gradients using differentiation?
0
reply
Report
#10
(Original post by PIPSarah)
f(x) is the gradient function isnt it? you use it to find gradients using differentiation?
f(x) is the gradient function isnt it? you use it to find gradients using differentiation?
0
reply
Report
#11
remember the little function boxes you did when you were like 10. x goes in, f(x) comes out. the function could be, say, adding 5, dividing by two... whatever.
0
reply
Report
#12
(Original post by chanandler)
I need to know what f(x) means and why we use it in maths? I'm really stuck.
Thanks in advance
I need to know what f(x) means and why we use it in maths? I'm really stuck.
Thanks in advance
f(x) just means a 'function' of 'x',
0
reply
Report
#14
I'm Korean high school student.and i have more questions after reading all the replys...f(x) means function basically as we all learned...but when we think about the polynomial,the question says 'the polynomial f(x)=3x 4....'I want to ask that f(x)'s meaning...
0
reply
Report
#16
0
reply
X
Quick Reply
