Để B nguyên thì 4x-1 chia hết cho 3-x
3-x chia hết cho 3-x
=> 4(3-x) chia hết cho 3-x
=> 12-4x chia hết cho 3-x
=> (4x-1) + ( 12-4x) chia hết cho 3-x
=> 11 chia hết cho 3-x
3-x \(\in\){-11;-1;1;11}
x\(\in\){14;4;2;-8}
Tim x nguyen de phan so sau la so nguyen
4x-1/3-x
tim so nguyen x de 2n+1/x-3 co gia tri la 1 so nguyen
cho bieu thuc M 3x-4
x-4
a) tim so nguyen x de m la mot so nguyen
b)tim so nguyen x de m la 1 phan so
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
A = 2/ x-1 .tim dieu kien cua x de A la phan so . tim A khi x = 2 ; x = -3. tim dieu kien cua x de A la so nguyen ( A thuoc Z )
7. A= 4+3/x -1
a tim dieu kien de a la phan so
B tim dieu kien de a la so nguyen
tim so nguyen x de phan so sau la so nguyen x+3/x-2
tim cac so nguyen de tong sau la so nguyen:
a, x+1/x+3+x+12/x+13
tim so nguyen x de cac phan so sau la so nguyen a) 13:x-1 b)x+3:x-2 c) 2.x:x+2
