ethompsonn

If A = {4, 7, 10, 13, 17} and B = {3, 5, 7, 9}, then which of the following statements is false?
ØCA
BCB <--- i think its this
BCA

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ethompsonn

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there is an _ under the C mark, in the second answer BTW!

hba

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Its a compliment ?

ethompsonn

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??

hba

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Not sure what you are asking here :(

ethompsonn

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nvm how about this one Use the listing method to represent the following set.
{x | x I, x ≥ 3}
{..., 0, 1, 2, 3}
{3, 4, 5, 6, ...}
{4, 5, 6, 7, ...}

hba

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x is greater than or equal to 3.
Now you tell me ? @ethompsonn

ethompsonn

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idk

hba

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remember the set should contain elements which are equal or greater than 3 ?

hba

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@ethompsonn

ethompsonn

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derrr...umm..err

Aditi_Singh

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Some authors use "⊂" for subset .. and "⊆" for "proper subset" ..
and some take the other way round.
Which way have you learnt it @ethompsonn ?

ethompsonn

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so the first one

ethompsonn

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the way u mentioned C for subset

ethompsonn

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and the other one

Aditi_Singh

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Okay!

Aditi_Singh

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Here are some important properties fo sets :
• Null set is a subset of every set.
• Every set is a subset of itself.
Thus, this makes the first and the second option correct.
And, you're left with just the 3rd option.
So, That's the false statement.

ethompsonn

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oooh, i get it

Aditi_Singh

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:)