a, \(\frac{n-4}{n+1}=\frac{n+1-5}{n+1}=\frac{-5}{n+1}\)
Tự xét Ư nha.
b, \(\frac{n}{n-2}=\frac{n-2+2}{n-2}=\frac{2}{n-2}\)
Tự xét Ư nha.
Các câu hỏi tương tự
Tim cac so nguyen n de cac phan so sau co giai tri la so nguyen
a)\(\frac{n+5}{n}\)
b)\(\frac{n-2}{4}\)
c)\(\frac{n+5}{n+2}\)
1. Cho bieu thuc Afrac{-4}{n-1}(voi ninZ)a. So nguyen n phai co dieu Kien gi de A la Phan sob. Tin cac so nguyen n de A co gia tri nguyen2. Cho Phan so B frac{n}{n-4}(voi ninZ)a. Tim cac so Nguyen n de B la phan sob. Tim tat ca cac so nguyen n de B co gia tri nguyen3. Chung minh rang cac Phan so sau Co gia tri la so tu nhiena. frac{10^{2016}+2}{3}b.frac{10^{2016}+8}{9}
Đọc tiếp
1. Cho bieu thuc A=\(\frac{-4}{n-1}\)(voi n\(\in\)Z)
a. So nguyen n phai co dieu Kien gi de A la Phan so
b. Tin cac so nguyen n de A co gia tri nguyen
2. Cho Phan so B= \(\frac{n}{n-4}\)(voi n\(\in\)Z)
a. Tim cac so Nguyen n de B la phan so
b. Tim tat ca cac so nguyen n de B co gia tri nguyen
3. Chung minh rang cac Phan so sau Co gia tri la so tu nhien
a. \(\frac{10^{2016}+2}{3}\)
b.\(\frac{10^{2016}+8}{9}\)
1. Cho Phan so B=\(\frac{n}{n-4}\)(voi n \(\in\)Z)
a. Tim So nguyen n de B la Phan so
b. Tim so Nguyen n de B co Gia tri la so tu nhien
2. Tim cac so nguyen x, y biet
a.\(\frac{x}{-3}=\frac{4}{y}\)
b. \(\frac{2}{x}=\frac{y}{-9}\)
Cho phan so A = n+1/n-3 (nCZ)
a) Tim cac gia tri cua n de A la phan so
b) Tim n de A co gia tri nguyen
Tim n \(\in\)Z de cac phan so \(\frac{-12}{n}\);\(\frac{15}{n-2}\);\(\frac{8}{n+1}\)dong thoi co giai tri nguyen
tim tat ca cac gia tri nguyen cua n de phan so A=3n+2/n-1 co gia tri la so nguyen
5, Tim gia tri nguyen cua n de cac phan so sau co gia tri la so nguyen
\(A=\frac{3n+4}{n-1}\)
\(B=\frac{6n-3}{3n+1}\)
Cho: A= \(\frac{n+1}{n-3}\)
a) Tim nde A la phan so.
b) Tim n de A la phan so toi gian.
c) Tim n de A co gia tri lon nhat.
tim n de cac phan so sau co gia tri la so tu nhien
21/n5
n+12/n-2
n2+4/n+1
5n+32/n+4