How do i draw the sign diagram for this? How do ik the positive and the negative?
#sign diagram
sudden birch
hollow chasmBOT
hollow chasmBOT
What step are you on?
1. I don't know where to begin.
2. I have begun but got stuck midway.
3. I got an answer but I was told that it's wrong.
4. I got an answer and would like my work checked.
5. I have a question about someone else's work/solution.
6. I have completed the problem and don't need help anymore. Thank you.
7. None of the above
someone explain to me pls!
fickle delta
@sudden birch To do the sign diagram, just look where the the curve is above/below the x-axis
fickle delta
At x = 1, the curve has a vertical asymptote (the dotted vertical line). That means that it's not defined for x = 1 !
fickle delta
No, 1 is not positive, the little dotted lines above it means that it's an impossible value
sudden birch
The key answers say otherwise
fickle delta
The function never intersects with x = 1
sudden birch
Can u solve it as for a 10th grader?
fickle delta
If this is the key answer, the DOTTED little line above the 1 mean that 1 is not defined
It doesn't mean that for x = 1, the curve is positive
sudden birch
I get what u mean but above it theres positive
fickle delta
I get what u mean but above it theres positive
above what?
sudden birch
fickle delta
No, that's to the RIGHT of 1. Not above it.
sudden birch
My bad
So it positive or what
Ik its undefined
but why is 1 positive if its under the x axis
fickle delta
For x = 1: The function is UNDEFINED. That means it's neither positive nor negative! That's why you draw a little dotted line ABOVE the 1 to represent that it's undefined.
fickle delta
but why is 1 positive if its under the x axis
1 IS NOT positive !!!
fickle delta
Well the part to RIGHT of 1 is positive, you can see it on the graph. The function is above the x-axis for x > 1.
sudden birch
Thanks so much