tim x biet \(\frac{-1}{3}\le x\le\frac{-2}{7}\)
giup mk voi
tim x , biet :
\(\frac{-1}{3}\le x\le\frac{-2}{7}\)
giup mk nha cac bn,lam on
= -7/21 < hoặc bằng X . X < hoặc bằng -6/21
=> X =-7/21 hoặc X = -6/21
tim x biet :
a. 3x+4 _>7
b. -5x+1<11
c. \(\frac{5}{x-3}\)< 0
d. \(\frac{-7}{2-x}\)> 0
giup mk voi ai bit thi giup mk tick
Tim x biet :
a, \(4\frac{1}{3}\left(\frac{1}{6}-\frac{1}{2}\right)\le x\le\frac{2}{3}\left(\frac{1}{2}-\frac{1}{3}-\frac{3}{4}\right)\) x thuoc Z
b , \(|x-3|+1=x\)
\(\frac{x-1}{2}=\frac{y-2}{3}=\frac{z-3}{4}vax-2y+3z=14\)
de bai la tim x, y, z biet
giup mk
mk tk
mk dag voi
\(\frac{x-1}{2}\)= \(\frac{2y-4}{6}\)=\(\frac{3z-9}{12}\)=\(\frac{x-1-2y+4+3z-9}{2-6+12}\)= \(\frac{14-1+4-9}{8}\)= 1
=> x =2+1=3
y= (6+4) : 2=5
z=(12+9) : 3=7
cho biet 2 dai luong x va y ti le nghich voi nhau va khi x=3thi y=5
a, tim he so ti le a cua y doi voi x va he so ti le b cua x doi voi y
b,hay bieu dien y theo x va x theo
c, tinh gia tri cua y khi x=-20;x=10
d,tinh gia tri cua x khi y=-20;y=10
giup mk nhe dang can gap!
a: a=xy=15
b=xy=15
b: y=15/x
x=15/y
c: Khi x=-20 thì y=15/x=-3/4
Khi x=10 thì y=15/x=3/2
d: Khi y=-20 thì x=15/y=-3/4
Khi y=10 thì x=15/y=3/2
Cho P=\(\left(\frac{2\sqrt{x}}{x\sqrt{x}+\sqrt{x}-x-1}-\frac{1}{\sqrt{x}-1}\right):\left(1+\frac{\sqrt{x}}{x+1}\right)\)
Rut gon va
Tim x de P \(\le\)0
Giup mnh voi huhuhuhuhuhuhuhuhuhuhuhuhu
nhung bn thong minh oi giup mk voi
Cho ti le thuc x/4=y/7 va xy=112. tim x va y
Đặt x = 4k
y = 7k
=> 4k.7k = 112
=> 28.k^2 = 112
=> k^2 = 112 : 28 = 4
=> k = 2
=> x = 4.2 = 8
y = 7.2 = 14
tim so nguyen x:
1+\(\frac{1}{3}+\frac{1}{6}+...+\frac{1}{x\left(x+1\right):2}=1\frac{1991}{1993}\)
giup le nha! love
Tim x trong ti le thuc sau x-3/5-x=5/7 giup minh voi :)))))))