Để A nhận giá trị nguyên
=> 5x-3 chia hết x-2
=>5x-10+7chia hết x-2
=>7 chia hết cho x-2 (5x-10 chia hết cho x-2)
=>x-2 e(7)={1,-1,7,-7}
Nếu x-2=1=>x=1+2=3
Nếu x-2=-1=>x=-1+2=1
Nếu x-2=7=>x=7+2=9
Nếu x-2=-7=>x=-7+2=-5
Vậy x e{3,1,9-5}
tim so nguyen x sao cho x nhan gia tri nguyen: A=5x-3/x-2
tim cac gia tri nguyen cua x de y nhan gia tri nguyen,biet :y=5x+9/x+3
tim cac gia tri nguyen x sao cho bieu thuc p=2x-1/2x+1 nhan gia tri nguyen
cho A = 1/15 nhan 225/(8+2) + 3/14 nhan 196/(3x+6) (x thuoc Z; x khac -2 )
a) Rut gon A
b) Tim x thuoc Z de A thuoc Z
c) trong cac gia tri nguyen A tim gia tri lon nhat va gia tri nho nhat
Tim x nguyen de bt:
B=13phan2x+3 (nhan gia tri nguyen)
tim so nguyen x de 5x/3 : 10x2+ 5x/21 co gia tri la so nguyen
tim so nguyen x, biet
a. 7 - x = 8 - ( -7 )
b. x - 8 = ( -3 ) = -8
tim so nguyen a, biet
a. gia tri tuyet doi a gia tri tuyet doi = 2
b. gia tri tuyet doi a + 2 gia tri tuyet doi = 0
Tim cac gia tri nguyen cua x biet
a, Y=5x+9/ x+3
b, Tim cac cap so nguyen x , y thoa mai he thuc :
(2x-1).(y+4)
tim 2 so tu nhien a va b biet a<b , 1/a+1/b = 1/2
b2 : tim so nguyen x de 5x/3 : 10x2+ 5x/21 co gia tri la so nguyen
trình bày cách làm cụ thể nha