b,2n+3/7:Tim cac so nguyen n de phan so la mot so nguyen
Cho bieu thuc A = 3/n-2
a) Tim cac so nguyen n de bieu thuc A la phan so
b) Tim cac so nguyen n de A la mot so nguyen
Cac giup minh nhe minh dang can gap.
tim cac so nguyen n de cac phan so sau co gia tri la mot so nguyen
n-5/n-3
Để n - 5/ n -3 là số nguyên thì n - 5 chia hết cho n -3
mà n - 3 chia hết cho n -3
=> ( n - 5) - ( n- 3) chia hết cho n -3
=> 8 chia hết cho n -3
<=> n - 3 thuộc Ư{ 8 } = { +- 1;+-8;+-2: +- 4}
Nếu ..............
tim so nguyen n de phan so 4n+5/2n-1 co gia tri la mot
so nguyen
4n+5/2n-1 nguyên khi
4n+5 \(⋮\)2n-1
hay 2(2n-1)+9 \(⋮\)2n-1
=>9 \(⋮\)2n-1
=>2n-1 thuộc Ư(9) thuộc 1,-1,3,-3,9,-9
ta có
2n-1 1 -1 3 -3 9 -9
2n 2 0 4 -2 10 -8
n 1 0 2 -1 5 -4
tim cac so nguyen n de phan so sau co gia tri nguyen
2n+3 / 7
Cho A= n-1/n+4
a) Tim n nguyen de A la mot phan so
b) Tim n nguyen de A la mot so nguyen
tim so nguyen duong nho nhat de khi nhan no voi moi mot trong cac phan so toi gian 3/4, -5/11, 7/12 deu duoc tich la nhung so nguyen
tim so nguyen duong nho nhat de khi nhan no voi mot trong cac phan so : 3/4 : -5/11 ;7/12 deu duoc tich la so nguyen
HELP ME QUICKLY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
cho A=n-1/n-4
tim n nguyen de A la mot phan so
tim n nguyen de n la mot so nguyen
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