View Full Version : Calculus help

09-24-2010, 12:50 AM
The picture isn't that clear, would you be able to tell me the title of the book ? I can look if I have a solution manual or something..I'm on my phone can't write a solution

09-24-2010, 12:53 AM
f(x) at x=5 is undefined because lim f(x) as it approaches x=5 from the right does not equal lim f(x) as it approaches it from the left.
Basically, if the derivative of the left part of the graph doesn't equal the derivative from the right path of the graph, you have no means of determining the slope at that point.
Now, if it was a smooth like, a nice beautiful parabola with just one point missing, then you could determine it: lim f(x) as it approaches from the right would equal lim f(x) as it approaches from the left.

Admin Khan
09-24-2010, 12:54 AM
Piece of cake,

A)As X approaches 1 from the left the limit is 2
B)As X approaches 1 from the right the limit is 3
C)As X approach just 1, quite obviously the limit DNE[Does not exist]
D)As X approaches just 5, the limit is 4
E)F(5) does not exist, since the hole is not filled in. If the hole was filled in, I would have gave you an answer.

09-24-2010, 12:59 AM
thanks but you didnt answer A) B) C) D) :( i am having trouble with this.

lol.. I'm sorry.. I wasn't sure what you were asking, you didn't say which answers you want. As you were talking about the last one.. I assumed that's the one you're looking for. Sorry. =/