Tim so nguyen x , y, z , t biet : 38 * ( x * y * z * t + x * y + x * t + z * t + 1 ) = 49 * ( y * z * t + y +t )
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bai 1 tim cac so nguyen x,y biet
a,x/3=7/y b,x/y=-3/11 c,x/y-1=5/-19
bai 2 tim cac so nguyen x,y,z,t biet
12/-6=x/5=-y/3=z/-17=-t/-9
\(a,\frac{x}{3}=\frac{7}{y}\)
\(\Rightarrow x\cdot y=3\cdot7\)
\(\Rightarrow x\cdot y=21\)
\(\Rightarrow x;y\inƯ\left(21\right)=\left\{\pm1;\pm21;\pm3;\pm7\right\}\)
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tim cac so nguyen duong x , y , z , t sao cho:
38(x.y.z.t+x.y+x.t+z.t+1)=49(y.z.t+y+t)
trinh bay cach lam cho minh voi nhe
tim ba so nguyen duong x,y,z,t sao cho xyzt=x+y+z+t
Chung minh A= x/y+z+t =y/z+t+x = z/t+x+y = t/x+y+z la so nguyen.
tham khảo: https://hoidap247.com/cau-hoi/1025167
cho x/y+z+t=y/z+t+x=z/t+x+y=t/x+y+z cmr bieu thuc sau co gia tri nguyen P=(x+y/z+t)+(y+z/t+x)+(z+t/x+y)=(t+x/y+z)
x/18=-98/y=-14/z=-t/102=u/-78
Tim so nguyen x,y,z,t,u
1 tim MAX cua (x+z)(y+t) biet x^2+y^2+z^2+t^2=1
2 tim MAX cua (x+z)(y+t) biet x^2+y^2+2z^2+2t^2=1
cho x/(y+z+t)=y/(z+t+x)=z/(t+x+y)=t/(x+y+z)
cmr bieu thuc sau co gia tri nguyen
P=(x+y)/(z+t)+(y+z)/(t+x)+(z+t)/(x+y)+(t+x)/(y+z)
x/18=-98/y=-14/z=-t/102=u/-78
Tim cac so nguyen x,y,z,t,u