Question

Dau coroanaaaaaaaaaaa​

Answer 1

Răspuns:

7

Explicație pas cu pas:

a≤5, a impar ⇒a={1,3,5}

2,(1)=(21-2)/9=19/9

2,(3)=(23-2)/9=21/9

2,(5)=(21-2)/9=23/9

19/9+21/9+23/9=(19+21+23)9=63/9=7∈N