hopelynnwelch
Junior Member
- Joined
- Jan 16, 2015
- Messages
- 60
So I have this on a quiz and the answer is that the limit DNE. I am trying to reason why this is the answer...
I am thinking the reason this limit DNE is because of the information given? I know that the stock was at 33 dollars and that it moved in a negative direction 14 dollars, but I don't how the stock moved in the positive direction. Meaning I don't know if it was ever more than 33 dollars. Does this mean that because I can't evaluate it from both directions the limit DNE?
If it asked me what was the limit as t approaches 11 from the negative side, then a limit would exist?
Here is the problem:
Prior to the September 11, 2001 attacks, an airline's stock was trading at around $33 per share. Immediately following the attacks, the share price dropped by $14.00. Let U(t) be this cost at time t, and take t = 11 to represent September 11, 2001. What does the given information tell you aboutlim t→11 U(t)?
Answer: DNE
I am thinking the reason this limit DNE is because of the information given? I know that the stock was at 33 dollars and that it moved in a negative direction 14 dollars, but I don't how the stock moved in the positive direction. Meaning I don't know if it was ever more than 33 dollars. Does this mean that because I can't evaluate it from both directions the limit DNE?
If it asked me what was the limit as t approaches 11 from the negative side, then a limit would exist?
Here is the problem:
Prior to the September 11, 2001 attacks, an airline's stock was trading at around $33 per share. Immediately following the attacks, the share price dropped by $14.00. Let U(t) be this cost at time t, and take t = 11 to represent September 11, 2001. What does the given information tell you aboutlim t→11 U(t)?
Answer: DNE
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