3 years ago

Need help please some one

Mathematics

2 answers:

ella [17]3 years ago

5 0

Answer:

gforse

Step-by-step explanation: 660

liubo4ka [24]3 years ago

3 0

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2 years ago

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Explain whether the following given sets are closed under addition:

Ivan

Answer:

Step-by-step explanation:

a) Yes.

$\forall\ a,b\ \in\ B,\ a+b\in B\ (since\ 0+0=0)$

b) Yes

$W=\{0,1,2,3,..,\}\ (whole\ numbers)\\\forall\ a,b\ \in\ 3W,\ a+b\in 3W\\since:\\a\ \in\ 3W \Longrightarrow\ \exists\ k_1\in W | a=3*k_1\\\\b\ \in\ 3W \Longrightarrow\ \exists\ k_2\in W | b=3*k_2\\\\a+b=3*k_1+3*k_2=3*(k_1+k_2) \in 3W\\$

c) Yes

$\forall n\ \in\ \mathbb{N}: \Longrightarrow\ n+1 \in\ \mathbb{N}\\$

d) No

$3\in V , 3+3=6\notin V\\$

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3 years ago

What is the area of this figure? Enter your answer in the box. 8m 5 m 9m

Iteru [2.4K]

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Step-by-step explanation:

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asambeis [7]

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Step-by-step explanation:

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2 years ago

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77julia77 [94]

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