Giai toan 8 giup minh voi cac ban?

c/m

a, n^5-5n^3+4n chia het cho 120; voi moi n thuoc Z

b, n^4+6n^3+11n^2+30n-24 chia het cho 24; voi moi n tuoc Z

c, n^3-3n^2+3 chia het cho 48; voi moi so nguyen le n

cac ban giup minh nhe !!! cam on nhieu ???

pebim hau ta 10 diem 5 sao cho ai giai giup bai nay trong ngay hom ni(((can gap)))

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