Question

15 puncte
Rezolvarea pe o foaie ​

Answer 1

Răspuns:

Explicație pas cu pas:

A= D₁₀...............D₁₀-divizorii  lui 10

A= { 1,2,5,10 }

x=10/1= 10

x=10/2=5

x=10/5=2

x=10/10=1

A= {10,5,2,1 }

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D₁₅={1,3,5,15 }

2x+1=15

2x= 15-1

2x=14

x= 14:2

x=7

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2x+1=1

2x= 1-1

2x=0

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2x+1=3

2x= 3-1

2x= 2

x= 2:2

x= 1

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2x+1=5

2x= 5-1

2x=4

x=4:2

x=2

B=x∈N { 2,1,0 }

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D₂₀=x∈ Z= { 1,2,4,5,10 ,20 ,-1 ,-2,-4,-5 ,-10 ,-20}

C=x∈Z={ 1,2,4,5,10 ,-10 ,-5,-4,-2,-1 }

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5³=125

125 < 150

D={5³}