de A toi gian thi
n-5 chia het cho n+1
(n+1)-6 chia het cho n+1
vi n+1 chia het cho n+1
nen -6 chia het cho n+1
=> n+1 thuoc U(-6)=(1;-1;2;-2;3;-3;6;-6)
| n+1 | 1 | -1 | 2 | -2 | 3 | -3 | 6 | -6 |
| n | 0 | -2 | 1 | -3 | 2 | -4 | 5 | -7 |
=> n thuoc (0;-2;1;-1;-3;2;-4;5;-7)
cho A=n-5/n+1 n thuoc z va n khac -1
a, tim n deA co gia tri ngyen
b, tim n de A la phan so toi gian
minh can gap cac ban lam mau len!!!!!!!!!!!!!!!!!!!!!!!!!
Cho phan so: P = \(\frac{2n+7}{5n+2}\)(n thuoc Z)
a)Tim n thuoc z de P la phan so chua toi gian.
b)Tim n thuoc Z sao cho P la phan so toi gian.
cho phan so n+8/n-7 voi n thuoc N , n>7
A,tim n de phan so co gia tri guyen
B,tim n de phan so toi gian
cho phan so A=n+1/n-3 (n thuoc z;n khac 3)
tim n de A co gia tri nguyen
Cho A = x+1/x-3; (x thuoc Z; x khac 3). Tim x de A la phan so toi gian
cho A = 3N+2/6N+3
A TIM N DE a LA PHAN SO
b chung to A la phan so toi gian voi moi n thuoc N
cho phan so \(B=\frac{4n+1}{2n-3}\)n thuoc z
a, tim n de phan so B toi gian
b, tim n de B dat gia tri nho nhat , gia tri lon nhat va tinh cac gia tri do.
A=n-5/n+1 Tim n de A la phan so toi gian
Tim n de phan so sau toi gian voi n thuoc N 2n+3/4n+1