so cac so nguyen x sao cho (x^2+7x+2):(x+7) la.......
tim cac so x la so nguyen thooa man (x^2 +7x + 2) chia het cho x +7
ta co:x2+7x+2 chia het cho x+7
x+7 chia het cho x+7
=> x(x+7) chia het cho x+7
hay x2+7x chia het cho x+7
=>(x2+7x+2)-(x2+7x) chia het cho x+7
2 chia het cho x+7
=> x + 7 thuoc uoc cua 2{1;2;-1;-2}
=>x thuoc {-6;-5;-8-9}
so cac so nguyen x sao cho(\(x^2+7x+2\)) chia het cho (x+7)
(x2+7x+2) chia hết cho (x+7)
[x(x+7)+2] chia hết cho (x+7)
=> 2 chia hết cho (x+7) hay (x+7) EƯ(2)={1;-1;2;-2}
=>xE{-6;-8;-5;-9}
=> có 4 số nguyên x thỏa mãn đề
so cac so nguyen x thoa man \(\left(x^2+7x+2\right)chiahet\left(x+7\right)la\)
cho 2 so x;y la cac so nguyen sao cho :/x/ +/y/ = 2 so cap (x;y) thoa man la
1/so cac so chan co cac chu so khac nhau lap tu cac chu so 1;2;3;4
2/so cac so nguyen thoa man /-12x+7/=40 la
3/tap hop cac so nguyen x thoa man /7-x/=/x+3/ la
2 nguoi nhanh nhat se duoc like
TIM CAC SO NGUYEN X SAO CHO ( -2240 : 6X+3 ) : ( 1+ 2 : 3 ) LA SO NGUYEN
so cac so nguyen x sao cho (x2+7+2) chia het (x+7)
Đặt a=(x^2+7x+2)/ (x+7) =x+2/(x+7)
Để a nguyên thì 2 chia hết cho x+7 =>S(x+7) ={1,-1,2,-2} =>S(x)={-6,-8,-5,-9}
Thử lại suy ra S={-6,-8,-5,-9}
tim tat ca cac so nguyen duong x,y sao cho cac so x2+3.y va y2+3.x deu la so chinh phuong cua 1 so
tim so nguyen x sao cho \(\sqrt{x^2+7x}\)la so huu ti