Math / Numbers & Operations

Question15 Arătați că: a numărul $A=3^{15}+3^{16}+3^{17}$ este divizibil cu 13; Rezolvare: $\square$ b numărul $B=2^{22}+2^{24}+2^{26}$ este divizibil cu 21 . Rezolvare: $\square$

Studdy Solution
Therefore, $B$ is divisible by 21. $\boxed{B \text{ is divisible by } 21}$

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