Continuity At x = 2

[nycmathdad]

Determine whether g(x) = (x^2 + 9)/(x^2 - 4) is continuous at x = 2.

Let me try this one.

Is f(2) defined?

When x is 2, g(x) becomes (x^2 + 9)/0, which DNE. We can't divide by zero.

Since condition 1 fails, there's no need to test conditions 2 and 3.

I say the function is discontinuous at x = 2.

Yes?

 

[Harry_the_cat]

Yes

 

[jonah2.0]

Beer soaked ramblings follow.

Determine whether g(x) = (x^2 + 9)/(x^2 - 4) is continuous at x = 2.

Let me try this one.

Is f(2) defined?

When x is 2, g(x) becomes (x^2 + 9)/0, which DNE. We can't divide by zero.

Since condition 1 fails, there's no need to test conditions 2 and 3.

I say the function is discontinuous at x = 2.

Yes?

Function Notation 1

Someone recently told me that f(x) is not a function.The person went on to say that f represents the function while f(x) represents a number. Is this true?

www.freemathhelp.com

 

[nycmathdad]

Yes

So sorry for reposting threads. I just want a fresh start. Maybe you can talk some sense into jonah and his reading problems.