Tim x biet:
\(\left(\frac{1}{x}-\frac{2}{3}\right)^2-\frac{1}{16}=0\)
Cach lam ho minh nha
Thanks
tim x biet:
\(\left|x+\frac{1}{2}\right|+\left|x+\frac{1}{6}\right|+\left|x+\frac{1}{12}\right|+...+\left|x+\frac{1}{110}\right|=11x\)11x
Trinh bay cach lam ho minh nhe
Vế trái lớn hơn hoặc bằng 0 nên 11x lớn hơn hoặc bằng 0.
\(\Rightarrow x\ge0\)
Do vậy chỉ cần bỏ dấu giá trị tuyệt đối là tính được.
Kết quả cuối cùng được \(x=\frac{10}{11}\)
Tim x , y , z biet:
\(\frac{x}{y+z+1}=\frac{y}{z+x+2}=\frac{z}{x+y-3}=x+y+z\)
Cach lam ho minh voi
\(\left[\frac{31}{\left(2\frac{1}{3}\right):4}:\frac{31}{11}\right]\frac{1}{12}.x=\frac{1}{16}\)
minh can cach lam
ai nhanh minh tk
lop 6 thi cha chua hoc con gi nua
moi cap 1 con doi
tim x,y
\(\left(\frac{1}{2}x-3\right)^{10}+\left(y^2-\frac{1}{4}\right)^{20}=0\)
lam chi tiet cho minh roi minh tick cho
\(\Rightarrow\int^{\frac{1}{2}x-3=0}_{y^2-\frac{1}{4}=0}\Leftrightarrow\int^{x=6}_{\left(y-\frac{1}{2}\right)\left(y+\frac{1}{2}\right)=0}\Rightarrow\int^{x=6}_{\int^{y=\frac{1}{2}}_{y=-\frac{1}{2}}}\)
tim x biet
\(\left(x-\frac{1}{3}\right).\left(y-\frac{1}{2}\right).\left(z-5\right)=0\)
và x+2=y+1=z+3
\(\left(x-\frac{1}{3}\right)\left(y-\frac{1}{2}\right)\left(z-5\right)=0\)
\(\Rightarrow\hept{\begin{cases}x=\frac{1}{3}\\y=\frac{1}{2}\\z=5\end{cases}}\)
Vì \(z+3=y+1\Rightarrow y=7\)
Lại có \(y+1=x+2\Rightarrow x=8-2=6\)
Vậy x = 6 ; y = 7 ; z = 5
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
a) thay \(x-y=\frac{3}{10}\)vào \(y\left(x-y\right)=\frac{-3}{50}\)ta có\(\frac{3}{10}y=\frac{-3}{50}\)=>\(y=\frac{-3}{50}:\frac{3}{10}=\frac{-1}{5}\)=>\(x-y=\frac{3}{10}\Rightarrow x=\frac{3}{10}+\frac{-1}{5}=\frac{1}{10}\)
hôm sau mik giải tip cho
Tim x biet
\(-5\left(x+\frac{1}{5}\right)-\frac{1}{2}\left(x-\frac{2}{3}\right)=\frac{3}{2}x-\frac{5}{6}\)
-5.(x+1/5) -1/2.(x-2/3)=3/2x-5/6
-5x + (-1) -1/2x -1/3=3/2x-5/6
-5x-1/2x-3/2x=1+1/3-5/6
x.(-5-1/2-3/2)= 6/6+2/6+(-5/6)
x.(-10/2+(-1/2)+(-3/2))=3/6
x.6/2=1/2
x=1/2:6/2
x=1/6
Vậy x = 1/6
Tim cac so x,y,z,t biet:
\(\frac{27}{4}=\frac{-x}{3}=\frac{3}{y^2}=\frac{\left(z+3\right)^3}{-4}=\frac{\left|t\right|-2}{8}\)
Trinh bai cach lanm ra he
tim x biet : \(\left(\frac{1}{3}-2x\right)^2=\frac{1}{16}\)
\(\frac{1}{16}=\left(\frac{1}{4}\right)^2=\left(-\frac{1}{4}\right)^2\)
=> \(\left(\frac{1}{3}-2x\right)=\frac{1}{4}\)hoặc \(\left(-\frac{1}{4}\right)\)
*) \(\left(\frac{1}{3}-2x\right)=\frac{1}{4}\)
\(\Rightarrow2x=\frac{1}{3}-\frac{1}{4}=\frac{1}{12}\Rightarrow x=\frac{1}{12}:2=\frac{1}{24}\)
*) \(\left(\frac{1}{3}-2x\right)=\left(-\frac{1}{4}\right)\)
\(\Rightarrow2x=\frac{1}{3}-\left(-\frac{1}{4}\right)=\frac{1}{3}+\frac{1}{4}=\frac{7}{12}\Rightarrow x=\frac{7}{12}:2=\frac{7}{24}\)
Vậy \(x\in\left\{\frac{1}{24};\frac{7}{24}\right\}\)