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Mathematics 14 Online
OpenStudy (lifeisadangerousgame):

Hi everyone, I was wondering if someone could check my assessment for me. All of the answers are logged in, I just need someone to check them and tell me if they're right or wrong.

OpenStudy (anonymous):

welcome

OpenStudy (lifeisadangerousgame):

OpenStudy (lifeisadangerousgame):

OpenStudy (anonymous):

2 is false.

OpenStudy (anonymous):

1 is correct :D

OpenStudy (anonymous):

I'm guessing there's an option D for assignment 2?

OpenStudy (lifeisadangerousgame):

Yes, that's in the assessment 2 (continued) attachment

OpenStudy (anonymous):

D is the correct ans for 2

OpenStudy (anonymous):

Thomas is right :D

OpenStudy (anonymous):

Notice how you get g(x)=0 for x=-3

OpenStudy (lifeisadangerousgame):

Wait, I'm confused, how do I get the answer for number 2?

OpenStudy (anonymous):

@thomas9, I think you would like to explain a bit more in order to help. I'll leave it to you as you find this mistake :D

OpenStudy (anonymous):

Ok, first off: |x+3| is always positive, so it's not B or C, right?

OpenStudy (lifeisadangerousgame):

Right

OpenStudy (anonymous):

From the graph in A you can see that g(x)=0 for x=3, but |3+3|=6 =/= 0, So it's not A either.

OpenStudy (anonymous):

Which leaves D, furthermore from D we find g(x)=0 for x=-3, which is true: |-3+3|=0.

OpenStudy (anonymous):

(g(x) is y in this case)

OpenStudy (lifeisadangerousgame):

Don't we want a positive number and not 0?

OpenStudy (anonymous):

0 is positive in my opinion, |x+3| is not negative if you like that better.

OpenStudy (anonymous):

So is it clear?

OpenStudy (lifeisadangerousgame):

Well yea, but how is the answer A not negative? They both have arrows going into the negative quarter

OpenStudy (anonymous):

The vertical axis denotes |x+3|, if |x+3| were negative it would be in the lower half of the graph. With option A it just goes in the left half which means x becomes negative, but not |x+3|.

OpenStudy (anonymous):

|dw:1333466168559:dw|

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