Toán Lớp 8: CMR
a) 35^10-1chia hết cho 1224
b) 35^10-1chia het cho 680
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Toán Lớp 8: CMR
a) 35^10-1chia hết cho 1224
b) 35^10-1chia het cho 680
Comments ( 2 )
Mà 1225 : 1224 dư 1
=> 35^2 ≡ 1 (mod 1224)
=> 35^100 ≡ 1 (mod 1224)
=> 35^10 – 1 \vdots 1224