số đứa trẻ đang trốn là:
10 - 1 - 5 = 4 (đứa trẻ)
đáp số: 4 đứa trẻ
số đứa trẻ đang trốn là:
10 - 1 - 5 = 4 (đứa trẻ)
đáp số: 4 đứa trẻ
Tim x,y,z biet:
1)|x|+|1-x|+|x+2|=5
2)|x-1/2|+|y+2\3|+|x^2+xz|=0
Tim x, y, z biet
a ) |x-3,5|+ |x+5|=0
b) |x-1| + (y+1)^2 + |z-1|=0
c) ( x-1/3)^2 + (y-2)^2+ (z-1)^2 be hon hoac bang 0
d)(x-z)^2+ (y+x)^2 + (z+1/4)^2 =0
Cac ban giup minh voi minh can gap lam
tim x,y,z biet x/2=y/3=z/5
va x2-2y2+z2=44
bai 1: Tim x biet
\(\hept{\begin{cases}x-y=\frac{3}{10}\\y\left(x-y\right)=-\frac{3}{50}\end{cases}}\)
bai 2: Tim x, y biet:
x+\(\left(-\frac{31}{12}\right)^2\)=\(\left(\frac{49}{12}\right)^2\)-x=y2
Bai 9: Tim x,y,z biet:
(x-1)2+(x+y)2+(xy-z)2=0
tim x,y,z biet xy=3,yz=6,xz=8
tim x,y,z biet y+z+1=x+z+2/y=x+y-3/2=1/x+y+z
Tim x biet :
a) x-1/2=y-2/3=z-3/4 va 2/x+3/y-z
tim x;y;z biet x(x+y+z)=2; y(x+y+z)=25; z(x+y+z)=-2; x>0
tim x y z biet
a) x.(y-2).(x^2-9)=0