Am i losing my mind

[Loki123]

See this apparently is not correct... HOOOOW? Either I am an idiot or there is a rule I haven't heard about. For example, these domains come from functions, B3 cannot equal 4 because then it would be x/0 which is impossible. So could the union still have to exclude 4? The problem states find the domain and the check which option is correct. This is one of the options I marked correct however apparently it is not. I figured because these are not directly related to the equation there are no special rules, however, now I don't know...

 

[lev888]

Please post the original problem and your complete solution.

 

[Loki123]

Please post the original problem and your complete solution.

Here is the problem that is the first half, the second half is the second picture and My solution is also on the previous picture (-infinity, 4)

 

[blamocur]

Either I am an idiot or there is a rule I haven't heard about.

Could not it be both? Sorry, could not resist this one

On a serious note, if I understood the problem statement correctly your solution looks good to me.

 

[Loki123]

Could not it be both? Sorry, could not resist this one

On a serious note, if I understood the problem statement correctly your solution looks good to me.

It's probably both. I don't know how this can't be (-infinity, 4) but could they have really made such a big mistake. Idk

 

[lev888]

Here is the problem that is the first half, the second half is the second picture and My solution is also on the previous picture (-infinity, 4)View attachment 30621

I see 3 functions. What is the question?

 

[Loki123]

I see 3 functions. What is the question?

Get the domain of those three functions and then solve the problem in the first picture posted here.

 

[lev888]

Get the domain of those three functions and then solve the problem in the first picture posted here.

I'd like to see the original problem statement. Is it available?

 

[Loki123]

I'd like to see the original problem statement. Is it available?

No, it was written to me in a different language. I can write it exactly as it is if you want?

 

[lev888]

No, it was written to me in a different language. I can write it exactly as it is if you want?

I'd like to see the exact wording of the problem, the question, the choices.

 

[Loki123]

I'd like to see the exact wording of the problem, the question, the choices.

 

[Deleted member 4993]

View attachment 30623

Where did 'd', 'e', 'f' & 'h' go?

 

[Loki123]

View attachment 30624

Where did 'd', 'e', 'f' & 'h' go?

I said I am losing my mind

 

[Deleted member 4993]

I said I am losing my mind

I suggest you are being careless.

 

[Loki123]

I suggest you are being careless.

I am sorry but it's just letters, and for you it might be normal to go by alphabet, but since my first language is not English I rarely do (more like never) so sometimes I mix it up, either way it makes no difference to the actual problem.

 

[BigBeachBanana]

Check the domain for f3 again.

 

[Loki123]

Check the domain for f3 again.

It's the same.

 

[BigBeachBanana]

View attachment 30625
It's the same.

My mistake, I flipped the sign. Anyways, your answer is correct.

 

[Loki123]

My mistake, I flipped the sign. Anyways, your answer is correct.

Okay, thank you. I am surprised something was this was not correct in the official solutions.

 

[BigBeachBanana]

Okay, thank you. I am surprised something was this was not correct in the official solutions.

What's the solution they gave?