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Tim n thuoc Z biet: n^2-2n+7/n-2
tim n thuoc Z biet
n+3\(⋮\)n2-7
Tim n thuoc Z biet: 4n+7/2n-3
cho A=n+3\n-2 (n thuoc Z)
a) tim n de A la phan so
b) tim n de A thuoc Z
c) tim n biet A=-4
tim n thuoc z , biet
n^2 +2n-7 chia het cho n+2
tim gia tri lon nhat cua A=2018-/x-7/-/y+2/
tim gia tri nho nhat cua B /x-500/+/x-300/
tim n thuoc Z,biet: a,3.n+2 chia het cho n-1; b, n^2 +5 chia het cho n+1
Tim n thuoc Z biet: n-3/2n+1
Tim n thuoc Z biet: 3n-2/n+2
1, tim sos uoc cua: 2^4.3^2.5
2, tim n biet: 3n+5 chia het cho : (n thuoc Z)
a, 7
b,11
3, tim a,b biet: 1a5b chia het cho 2,3,5,9
