Question

okay i have another question :D
please explain how i graph:
f(x)-[[2x+1]]-3
and....why?

Answer 1

is that - or is that =?

Answer 2

u mean f(x) =, not - ??

Answer 3

f(x)=-[[2x+1]]-3

Answer 4

that's what i mean

Answer 5

http://www.wolframalpha.com/input/?i=-floor(2x%2B1)-3

Answer 6

notice that
\[a[|x|]=[|ax|]\] and that
\[a|[x+b|]=a[|x|]+ab\]

Answer 7

that makes no sense to me....i don't get it

Answer 8

http://www.wolframalpha.com/input/?i=floor%28x%29
http://www.wolframalpha.com/input/?i=floor%282x%2B1%29
http://www.wolframalpha.com/input/?i=-floor%282x%2B1%29-3

Answer 9

first one is the basic one. just the greatest integer function. probably a picture in your text of the archetypal step function

Answer 10

then if you have [[x+1]] it says add one and take the greatest integer. that is the same as saying take the greatest integer and add 1 so it is [[x]]+1

Answer 11

but how do you find out where the 2 points are on each step for the step function graph

liek this

Answer 12

not sure exactly the question. it should be closed circle on left and open on right but i am not sure that is what you mean

Answer 13

try plugging a few values for x to see the pattern - e.g.:

x=0
x=0.5
x=1
x=1.5
x=2

See what values you get for f(X)

Answer 14

notice that your outputs are always integers. it is made up of horizontal lines