tim x,y nguyen duong de:
x2+3y va y2+3x la so chinh phuong
cho hai so duong xy thoa man \(\frac{4}{x^2}+\frac{5}{y^2}\ge9\) tim gia tri nho nhat cua bieu thuc\(Q=2x^2+\frac{6}{x^2}+3y^2+\frac{8}{y^2}\)
tim tap hop cac so nguyen x de gia tri cua da thuc x^3+3x-5 chia het cho x^2+2
cap so nguyen duong x y thoa man x(x-2)-(2-x)y-2(x-2)=3
1. số nguyên bé nhất sao cho biểu thức 2n2+n-7chi hé cho n-2 là n=?
2.tap hop cac gia tri x nguyen de \(\frac{6x^2+8x+12}{x+2}\)co gia tri nguyen co so phan tu la ?
tim gia tri cua a de nghiem cua pt
\(\frac{a^2-4}{2x-5}=2+a\) la so nguyen duong nhung nho hon 2
1. cho phan tuc A=\(\frac{x^2+5x+4}{x^2+x-12}\)tap hop cac gia tri cua x de phan thuc A ko xac dinh la
2.cho hinh thang ABCD co dien tich la18cm2. duong cao AH =3cm . Do dai duong trung binh hinh thang la
3.cho x, y nguyen thoa man x2+4x+y2-12=0 . khi do gia tri lon nhat P=x2+y2 la Pmax=?
4.gia tri nho nhat cua bieu thuc A= \(\frac{x^2}{4}+3x+y^2-\frac{14}{5}y+\frac{425}{25}la\)
tim so nguyen x de bieu thuc sau co gia tri nguyen
A=\(\frac{4x^3-6x+8x}{2x-2}\)
1) Chung minh tong hai so nguyen to la mot hop so
VD: 3+5=8
2) Phan tich da thuc 4x2-a2+y2-16b2+4xy+8ab thanh nhan tu
3) Gia tri nho nhat cua bieu thuc M= (x-1)(x+5)(x2+4x+5) la ...