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
tim n de cac cac phan so sau la phan so toi gian
\(\frac{n+7}{3};\frac{n+8}{4};\frac{n+9}{5};\frac{n+10}{6};\frac{n+11}{7}\)
tim so nguyen n de phan so sau toi gian
-3/5-n
n-1/7
Cho phan so A=\(\frac{n+1}{n-3}\left(n\inℤ,n\ne3\right)\).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
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-5/n+1 . tim so n de phan so tren la phan so toi gian
tim so tu nhien n de phan so sau day toi gian
a)3/n,5/n,12/n (n nho nhat)
b)5/n+8;6/n+9;7/n+10
Cho phan so A = \(\frac{n+1}{n-3}\)(\(n\inℤ,n\ne3\)). Tim n de A la phan so toi gian