Tim x,y: \(x^2-y^2+2x-4y-10=0\) voi x,y nguyen duong
a, Tim cac so nguyen duong x,y nho hon 10 sao cho 3x - 4y = -21
b, tim cac so nguen x,y sao cho xy -2x + 5y -12 = 0
a. Giai pt : 2x(8x-1)^2(4x-2)=9
b. giai pt : x^2-y^2+2x-4y-10=0 vs x,y thuoc so nguyen duong
tim hai so nguyen duong x,y ti le voi cac so 3,4 va thoai man: \(2x^2+y^2=136\)
\(\frac{x}{3}=\frac{y}{4}\)
=> \(\frac{x^2}{3^2}=\frac{y^2}{4^2}\)
\(\frac{x^2}{9}=\frac{y^2}{16}=\frac{2.x^2+y^2}{2.9+16}=\frac{136}{34}=4\)
=> \(\frac{x^2}{9}=4\) => x2 = 4.9 = 36 => x = 6 hoặc -6
Với x = 6 thì y = 4.6/3 = 8
Với x = -6 thì y = 4.(-6)/3 = -8
ĐS: x = 6,y = 8;
x = -6, y = -8
cho don thuc 3(a+1/a)x^4y^2 voi a la hang so ,a khac 0
a)tim a de da thuc luon khong am voi moi x,y
b)tim a de da thuc luon khong duong voi moi x,y
Tim x,y la so nguyen
a) 2x-3y+5= xy
b) x mu 2 +2xy+2x+4y
B2 Tim x,y la so nguyen to
x mu 2 -2y mu 2 =1
B3 Tim so tu nhienx,y
7 .(x-2004) mu 2 = 23- y mu 2
Tim cac so nguyen duong x;y biet: |x-2y+1|.|x+4y+3|=20
de ma suy ra 1 trong 2 ve la uoc cua 20
chi la uoc duong thoi vi cogia tri tuyet doi ma
tim cac so nguyen duong x;y biet |x-2y +1|.|x+4y+3| =20
Tim cac so nguyen duong x,y biet |x-2y+1|.|x+4y+3| = 20
tim cac so nguyen duong x,y biet |x-2y+1| |x+4y+3|=20