Tuyển Cộng tác viên Hoc24 nhiệm kì 26 tại đây: https://forms.gle/dK3zGK3LHFrgvTkJ6


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H24
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H24
29 tháng 12 2021 lúc 16:35

giúp với

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H24
29 tháng 12 2021 lúc 16:36

dg ktra hả

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H24
29 tháng 12 2021 lúc 16:36

phần 2 * 5 là 2 * 5 gạch trên nhé

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TT
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KL
17 tháng 9 2023 lúc 9:35

*) a + 5 = b + 7

⇒ a = b + 7 - 5

⇒ a = b + 2

⇒ a > b  (1)

*) b + 7 = c + 10

⇒ b = c + 10 - 7

⇒ b = c + 3

⇒ b > c  (2)

Từ (1) và (2) ⇒ a > b > c

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NT
17 tháng 9 2023 lúc 9:28

a+5=b+7=c+10

=>a+5=b+7 và b+7=c+10

=>a-b=2>0 và b-c=10-7=3>0

=>a>b và b>c

=>a>b>c

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LQ
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DD
3 tháng 10 2016 lúc 13:06

a>b>c

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LD
9 tháng 7 2018 lúc 9:32

9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999990999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999

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TN
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DM
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HT
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TV
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NC
28 tháng 9 2020 lúc 15:44

a}n,n+1,n+2

b]n-1,n,n+1

9]

A=[11,12,13,14,........................................................,997,998,999

B=(1,3,5,7,9,...................................................................................,999]

C=[0,2,4,6,8,..........................................................,2014]

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 Khách vãng lai đã xóa
PL
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SK
1 tháng 9 2021 lúc 20:08

1.

\(A=\left\{1,2,3,4,5\right\}\)

\(A=\left\{x\in N^{\circledast}|x\le5\right\}\)

2.

a)Số phần tử là: \(\left(51-13\right)\div2+1=20\)( p/t)

b)Số phần tử là: \(\left(39-8\right)+1=32\)( p/t)

c)Số phần tử là vô cực 

d)Số phần tử là 1

 

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NT
1 tháng 9 2021 lúc 21:22

Bài 1: 

A={1;2;3;4;5}

A={\(x\in Z^+\)|x<6}

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MD
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