1) Cho bieu thuc : A= 2n +1 /n-3 + 3n-5/ n-3 -  4n-5 /n-3

a)Tim so nguyen n de A nhan gia tri nguyen 

b) Tim n de A la phan so toi gian

cho bieu thuc :A=2n+1/n-3+3n-5/n-3-4n-5/n-3.a, tim n de a nhan gia tri nguyen .b,tim n de a la phan so toi gian

cho bieu thuc :A=2n+1/n-3+3n-5/n-3-4n-5/n-3.a, tim n de a nhan gia tri nguyen .b,tim n de a la phan so toi gian

bai 1:tim so nguyen x sao cho gia cua cac phan so la so nguyen

a)x+3/x-2

b)x²+3x-2/x+2

chu y:dau / la dau chia trong phan so

bai 2:cho A=2n+1/n-2 voi n la so nguyen

a)tim n de a la phan so

b)tim n de A nguyen

c)tinh gia tri cua A biet:n=2;1;-2;-1

giup minh voi minh dang can.Ai dung minh tick cho

Tim so tu nhien n de phan so A=\(\frac{2n+1}{n-3}+\frac{3n-5}{n-3}-\frac{4n-5}{n-3}\)

a/Tim n de A nhan gia tri nguyen

b/Tim n de A la phan so toi gian 

cho bieu thuc:P= 2n+1/n-3 + 3n-5/n-3 + 4n-5/n-3

a) tim n de P nhan gia tri nguyen

b)tim n de P la phan so toi gian

Tim cac so tu nhien n de cac phan so sau la phan so toi gian:

a)2n+3/4n+1         b) 3n+2/7n+1            c)2n+7/5n+2 

Cho bieu thuc A = 3/n-2

a) Tim cac so nguyen n de bieu thuc A la phan so

b) Tim cac so nguyen n de A la mot so nguyen

Cac giup minh nhe minh dang can gap.