Applying ln to a graph: where would it be continuous?

[smeiste]

Homework Statement

Homework Equations

I'm looking over in old midterm to prepare for a final and can't figure out what the correct answer is. No answers were ever given. I'm not cheating on anything, would just like to know what the correct answer is and why :)

The Attempt at a Solution

I think the answer is either B or C but I can't decide.

 

[SammyS]

Homework Statement

Homework Equations

I'm looking over in old midterm to prepare for a final and can't figure out what the correct answer is. No answers were ever given. I'm not cheating on anything, would just like to know what the correct answer is and why :)

The Attempt at a Solution

I think the answer is either B or C but I can't decide.

What is the domain of ln(u) ?

 

[smeiste]

um positive numbers only.

 

[Dick]

um positive numbers only.

Ok, so where is g(x) positive?

 

[smeiste]

from zero to infinity

 

[Dick]

from zero to infinity

I meant for what values of 'x' is g(x) positive? That's what you need to know.

 

[SammyS]

from zero to infinity

The question is: "For what values of x is g(x) greater than zero?" Don't forget that in order for g(x) > 0, x must also be in the domain of g.

 

[smeiste]

ohh okay. so the answer is B?

 

[Dick]

ohh okay. so the answer is B?

B is right.