𐙚 𝑷𝒊𝒖彡★
Thử phiên bản mới
2026-09-13 10:24:04
số đó =20t+9(t∈Z)
2026-09-13 09:48:31
hilu:)
2026-09-13 09:35:41
102848+1386−98+(−20)=104116102848 + 1386 - 98 + (-20) = 104116
2026-09-13 09:34:40
-))??
2026-09-12 21:26:42
hilo
2026-09-12 20:59:56
halo-))
2026-09-12 20:59:25
Ta có:
A=(3n+3+3n+1)+(2n+3+2n+2).A=(3^{n+3}+3^{n+1})+(2^{n+3}+2^{n+2}).
- 3n+3+3n+13^{n+3}+3^{n+1} là chẵn, 2n+3+2n+22^{n+3}+2^{n+2} là chẵn ⇒2∣A\Rightarrow 2\mid A.
- 3n+3+3n+13^{n+3}+3^{n+1} chia hết cho 33, và
2n+3+2n+2=3⋅2n+2⇒3∣A.2^{n+3}+2^{n+2}=3\cdot2^{n+2}\Rightarrow 3\mid A.
Vì (2,3)=1(2,3)=1, nên
6∣A.\boxed{6\mid A}.
Vậy AA chia hết cho 66.
2026-08-09 10:23:13
Mk ạ
2026-08-01 20:59:13
xàm vz
2026-03-02 21:34:27