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Verified answer
Materi : Modulo dan KongruensiPembahasan :
3²¹ mod 10
= (3²)¹⁰ . 3 mod 10
= (9 mod 10)¹⁰ . 3 mod 10
= 1 . 3 mod 10
= 3 mod 10
Jadi 3²¹ dibagi 10 akan bersisa 3