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# C4 Elmwood question watch

1. For part C: I got the modulus of X<1/3. But the answer is -1/3<X<1/3. I'm not sure why, can someone explain?!

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2. Just from the information in your post, I believe I can see your mistake.

Remember the modulus will always be positive, that does not mean x has to be positive... It could be negative, too. Remember what the modulus actually does.

For example, you know the modulus of -1 = 1.

So... x could be either positive or negative, as |x| = 1/3.

|-1/3| = 1/3
|1/3| = 1/3

And given the nature of the question:
-1/3 < x < 1/3 is your solution(s).

I hope I explained this sufficiently enough
3. (Original post by Lilly1234567890)

For part C: I got the modulus of X<1/3. But the answer is -1/3<X<1/3. I'm not sure why, can someone explain?!

Posted from TSR Mobile
These mean exactly the same thing so you've gotten it right.
4. (Original post by Lilly1234567890)

For part C: I got the modulus of X<1/3. But the answer is -1/3<X<1/3. I'm not sure why, can someone explain?!

Posted from TSR Mobile
and are the exact same thing
5. (Original post by DylanJ42)
and are the exact same thing
oh opps thanks !

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