Tim dieu kien cua so nguyen n sao cho phan so 1-2n/3n+2 la phan so toi gian
\(A=\dfrac{8n+193}{4n+3}\)
a,Tim n de A la p/s toi gian
b,Tim n trong khoang 150-170 de A rut gon duoc
tim n de phan so sau toi gian : \(\dfrac{-3}{5-n}\)
Cho phan so A= n-2/n+3
Tim n de
a) a la phan so
b) A thuoc Z
1, tim x thuoc Z de cho cac phan so sau la so nguyen
A, x+1 / 3
B, 17 / x -1
2, tim x thuoc Z de cho cac phan so sau dong thoi co gia tri nguyen
C, -12 / x
D, 15 / x -2
E, 8 / x +1
tap hop cac so nguyen n de n/n+3 co gia tri nguyen la S
tim phan so duong nho nhat de khi nhan no voi moi 1 phan so sau deu dc ket qua la so nguyen : 3/4 : 6/5 : 9/10
tim phan so duong nho nhat de khi nhan no voi moi 1 phan so sau deu dc ket qua la so nguyen : 3/4 ; 6/5 ; 9/10
tim phan so duong nho nhat de khi nhan no voi moi 1 phan so sau deu dc ket qua la so nguyen : 3/4 : 6/5 : 9/10