1/2+1/3<x<=1+1/2+1/5
=>5/6<x<=1+7/10
=>5/6<x<17/10
mà x là số nguyên
nên x=1
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Chương I : Số hữu tỉ. Số thực
Các câu hỏi tương tự
BT1: Tìm x, biết:
6) \(\dfrac{1}{2}.\left(\dfrac{1}{3}x-\dfrac{1}{5}\right)^2-\dfrac{1}{5}=-\dfrac{3}{40}\)
BT1: Tìm x, biết:
1) \(\left[\left(\dfrac{1}{2}x-\dfrac{1}{3}\right)^2+\dfrac{1}{4}\right]^3=\dfrac{1}{8}\)
BT1: Tìm x, biết:
1) \(x+\dfrac{1}{4}=\dfrac{3}{5}-\left(-\dfrac{1}{3}\right)\)
1.Tính:
left(dfrac{-2}{3}right)times0.75+1dfrac{2}{3}divleft(dfrac{-4}{9}right)+left(dfrac{-1}{2}right)^2
2.Tìm x:
a)dfrac{3}{4}-left(x+dfrac{1}{2}right)dfrac{4}{5}
b) left|x-dfrac{2}{5}right|+dfrac{3}{4}dfrac{11}{4}
3.Tìm n, biết:
a) dfrac{16}{2^n}2
b)dfrac{left(-3right)^n}{81}-27
4. Tìm ba số x,y,z biết:
dfrac{x}{2}dfrac{y}{3};dfrac{y}{5}dfrac{z}{4}và x-y+z -49
Đọc tiếp
1.Tính:
\(\left(\dfrac{-2}{3}\right)\)\(\times0.75+1\dfrac{2}{3}\div\left(\dfrac{-4}{9}\right)+\left(\dfrac{-1}{2}\right)^2\)
2.Tìm x:
a)\(\dfrac{3}{4}-\left(x+\dfrac{1}{2}\right)=\dfrac{4}{5}\)
b) \(\left|x-\dfrac{2}{5}\right|+\dfrac{3}{4}=\dfrac{11}{4}\)
3.Tìm n, biết:
a) \(\dfrac{16}{2^n}=2\)
b)\(\dfrac{\left(-3\right)^n}{81}=-27\)
4. Tìm ba số x,y,z biết:
\(\dfrac{x}{2}=\dfrac{y}{3};\dfrac{y}{5}=\dfrac{z}{4}\)và x-y+z= -49
tìm x biết
a) dfrac{1}{2}x+2dfrac{1}{2}3dfrac{1}{2}x-dfrac{3}{4}
b) dfrac{2}{3}x-dfrac{2}{5}dfrac{1}{2}x-dfrac{1}{3}
c) dfrac{1}{3}x+dfrac{2}{5}left(x+1right)0
d) dfrac{2}{3}-dfrac{1}{3}left(x-dfrac{3}{2}right)-dfrac{1}{2}left(2x+1right)5
e) dfrac{x+2015}{5}+dfrac{x+2016}{4}dfrac{x+2017}{3}+dfrac{x+2018}{2}
Đọc tiếp
tìm x biết
a) \(\dfrac{1}{2}x+2\dfrac{1}{2}=3\dfrac{1}{2}x-\dfrac{3}{4}\)
b) \(\dfrac{2}{3}x-\dfrac{2}{5}=\dfrac{1}{2}x-\dfrac{1}{3}\)
c) \(\dfrac{1}{3}x+\dfrac{2}{5}\left(x+1\right)=0\)
d) \(\dfrac{2}{3}-\dfrac{1}{3}\left(x-\dfrac{3}{2}\right)-\dfrac{1}{2}\left(2x+1\right)=5\)
e) \(\dfrac{x+2015}{5}+\dfrac{x+2016}{4}=\dfrac{x+2017}{3}+\dfrac{x+2018}{2}\)
tìm x,y,z biết
\(\left(x-\dfrac{1}{5}\right).\left(y+\dfrac{1}{2}\right).\left(z-3\right)=0\)
và x+1=y+2=Z+3
Tìm x, y, z:
a) left|x+dfrac{19}{5}right|+left|y+dfrac{1890}{1975}right|+left|z-2005right|0
b) left|x+dfrac{3}{4}right|+left|y-dfrac{1}{5}right|+left|x+y+zright| 0
c) dfrac{16}{2^x}1
d) left(2x-1right)^3-27
e) left(x-2right)^21
f) left(x+dfrac{1}{2}right)^2dfrac{4}{25}
g) left(x-1right)^2left(x-1right)^6
Đọc tiếp
Tìm x, y, z:
a) \(\left|x+\dfrac{19}{5}\right|+\left|y+\dfrac{1890}{1975}\right|+\left|z-2005\right|=0\)
b) \(\left|x+\dfrac{3}{4}\right|+\left|y-\dfrac{1}{5}\right|+\left|x+y+z\right|\) = 0
c) \(\dfrac{16}{2^x}=1\)
d) \(\left(2x-1\right)^3=-27\)
e) \(\left(x-2\right)^2=1\)
f) \(\left(x+\dfrac{1}{2}\right)^2=\dfrac{4}{25}\)
g) \(\left(x-1\right)^2=\left(x-1\right)^6\)
BT1: Tìm x, biết:
1) \(\dfrac{1}{3}-\left(1\dfrac{1}{2}-x\right)=0,3\)
BT1: Tìm x, biết:
2) \(0,28-0,3:\left(50\%.x-1\dfrac{1}{3}\right)=-1\dfrac{2}{3}\)