Question

a,b,e,g va rog urgent dau coroana​

Answer 1

Răspuns:

a)6/n∈N⇒n∈D₆= {1, 2,3,6}

b) 18/n+2∈N⇒(n+2)∈D₁₈={1,2,3,6,9,18}

n+2=1⇒n=-1,  

n2=2⇒n=0

n+2=3⇒n=1

n+2=6⇒n=4

n+2=9⇒n=7

n+2=18⇒n=16

e)17/2n-1 ∈Z⇒(2n-1)∈D₁₇={-17,-1,1,17}

2n-1=-17⇒2n=-16⇒n=-8

2n-1=-1⇒2n=0⇒n=0

2n-1=1⇒2n=2⇒n=1

2n-1=17⇒2n=18⇒n=9

Explicație pas cu pas: