Ajutorrrrrrrrr!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Răspuns:
(ab+ba)+[tex]2^{c}[/tex]=67
10a+b+10b+a=67-[tex]2^{c}[/tex]
11(a+b)=67-[tex]2^{c}[/tex] ⇒ 11 divide pe 67-[tex]2^{c}[/tex] ⇒ [tex]2^{c}[/tex]=1 ⇒ c=0
11(a+b)=66 a+b=6 ⇒ (a,b) ∈ {(1,5), (2,4), (3,3), (4,2), (5,1)} ⇒
abc∈{150, 240, 330, 420, 510}
Explicație pas cu pas: