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    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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    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
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    (Original post by Lilly1234567890)
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    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.
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    (Original post by Lilly1234567890)
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    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
     |X| &lt; \frac{1}{3} and  -\frac{1}{3}&lt;X&lt;\frac{1}{3} are the exact same thing
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    (Original post by DylanJ42)
     |X| &lt; \frac{1}{3} and  -\frac{1}{3}&lt;X&lt;\frac{1}{3} are the exact same thing
    oh opps thanks !
 
 
 
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