in a question such as;
f(x)=4x² +12x + c
where c is a constant
could f(x) be the same thing as y?
i know that f(x) stands for the value of the function of f at x but i don't know waht that means.
would it still work if i just made it y=4x² +12x + c?
it would make things much easier
2007-10-07 06:48:31 · 6 answers · asked by fangs*and*venom 2 in Science & Mathematics ➔ Mathematics
Yes. You can do that. The f(x) notation tells you that it is a function while the y notation only tells you that it is a relation. As far as the constant c is concerned it won't matter.
2007-10-07 06:54:05 · answer #1 · answered by chasrmck 6 · 0⤊ 0⤋
f(x) is the value of the function for any x. if x=2, it becomes f(2). if x=-3, it is f(-3) and so on. You can use y (usually used) or any other letter in place of f(x).
For every x, there is an f(x) or y. You can graph the function by using the pairs (x,y) for several x's.
e.g. f(x)=3x+5 or y=3x+5
f(1)=3(1)+5=8 - (1,8) is the (x,y) pair
f(5)=3(5)+5=20 - (5,20) is the (x,y) pair
2007-10-07 13:57:51 · answer #2 · answered by cidyah 7 · 1⤊ 0⤋
Yes. You can say y= f(x) anytime.
When you plot a graph of a function in the x-y coordinate system, y =f(x).
2007-10-07 13:54:23 · answer #3 · answered by ironduke8159 7 · 0⤊ 0⤋
All it's saying is that the value of x changes, but c is a constant.
2007-10-07 13:55:50 · answer #4 · answered by ? 7 · 0⤊ 0⤋
it would work easier if you did set it to y but after you are done with the problem you should change it back to the f(x).
2007-10-07 13:56:28 · answer #5 · answered by THE GOOD NIGHT 6 · 0⤊ 0⤋
yes u can
2007-10-07 17:19:33 · answer #6 · answered by mk_ultra_mo 1 · 0⤊ 0⤋