Tìm số nguyên x biết: a) \(-4\frac{3}{5}.2\frac{4}{23}\le x\le-2\frac{3}{5}:1\frac{6}{15}\)
b) \(-4\frac{1}{3}.\left(\frac{1}{2}-\frac{1}{6}\right)\le x\le-\frac{2}{3}\left(\frac{1}{3}-\frac{1}{2}-\frac{3}{4}\right)\)
Tìm số nguyên x biết:
a) \(-4\frac{3}{5}.2\frac{4}{23}\le x\le-2\frac{3}{5}:1\frac{6}{15}\)
b) \(-4\frac{1}{3}.\left(\frac{1}{2}-\frac{1}{6}\right)\le x\le-\frac{2}{3}\left(\frac{1}{3}-\frac{1}{2}-\frac{3}{4}\right)\)
a) \(-4\frac{3}{5}\cdot2\frac{4}{23}\le x\le-2\frac{3}{15}:1\frac{6}{15}\)
=> \(-\frac{23}{5}\cdot\frac{50}{23}\le x\le\frac{-33}{15}:\frac{21}{15}\)
=> \(-10\le x\le\frac{-11}{7}\)
=> \(x\in\left\{-10;-9,-8,-7,-6,-5,-4,-3,-2,-1\right\}\)
1.Tìm x
a, \(-\frac{23}{5}.\frac{50}{23}\le x\le-\frac{13}{5}:\frac{23}{17}\)
b,\(-4\frac{1}{3}.\left(\frac{1}{2}-\frac{1}{6}\right)\le x\le-\frac{2}{3}\left(\frac{1}{3}-\frac{1}{2}-\frac{3}{4}\right)\)
c,\(\frac{x-1}{2014}+\frac{x-2}{2013}=\frac{x-3}{2012}+\frac{x-4}{2011}\)
e)\(\frac{22}{15}-x=\frac{-8}{27}\)
g)\(\left(\frac{2x}{5}-1\right):\left(-5\right)=\frac{1}{4}\)
h)\(-2\frac{1}{4}x+9\frac{1}{4}=20\)
i)\(-4\frac{3}{5}\cdot2\frac{4}{23}\le x\le-2\frac{3}{5}:1\frac{6}{15}\left(x\in z\right)\)
\(e,\frac{22}{15}-x=-\frac{8}{27}\)
=> \(x=\frac{22}{15}-\left[-\frac{8}{27}\right]\)
=> \(x=\frac{22}{15}+\frac{8}{27}\)
=> \(x=\frac{198}{135}+\frac{40}{135}=\frac{198+40}{135}=\frac{238}{135}\)
\(g,\left[\frac{2x}{5}-1\right]:\left[-5\right]=\frac{1}{4}\)
=> \(\left[\frac{2x}{5}-\frac{1}{1}\right]=\frac{1}{4}\cdot\left[-5\right]\)
=> \(\left[\frac{2x}{5}-\frac{5}{5}\right]=-\frac{5}{4}\)
=> \(\frac{2x-5}{5}=-\frac{5}{4}\)
=> \(2x-5=-\frac{5}{4}\cdot5=-\frac{25}{4}\)
=> \(2x=-\frac{5}{4}\)
=> \(x=-\frac{5}{8}\)
\(h,-2\frac{1}{4}x+9\frac{1}{4}=20\)
=> \(-\frac{9}{4}x+\frac{37}{4}=20\)
=> \(-\frac{9}{4}x=20-\frac{37}{4}=\frac{43}{4}\)
=> \(x=\frac{43}{4}:\left[-\frac{9}{4}\right]=\frac{43}{4}\cdot\left[-\frac{4}{9}\right]=\frac{43}{1}\cdot\left[-\frac{1}{9}\right]=-\frac{43}{9}\)
\(i,-4\frac{3}{5}\cdot2\frac{4}{23}\le x\le-2\frac{3}{5}:1\frac{6}{15}\)
=> \(-\frac{23}{5}\cdot\frac{50}{23}\le x\le-\frac{13}{5}:\frac{21}{15}\)
=> \(-\frac{1}{1}\cdot\frac{10}{1}\le x\le-\frac{13}{5}\cdot\frac{15}{21}\)
=> \(-10\le x\le-\frac{13}{1}\cdot\frac{3}{21}\)
=> \(-10\le x\le-\frac{13}{1}\cdot\frac{1}{7}\)
=> \(-10\le x\le-\frac{13}{7}\)
Đến đây tìm x
Tìm x \(\in\)Z biết :
\(7\frac{1}{3}\left(\frac{1}{6}-\frac{1}{2}\right)\le x\le\frac{3}{4}\left(\frac{1}{6}-\frac{1}{5}-\frac{1}{15}\right)\)
Tìm số nguyên x thuộc z biết:
a) \(\frac{1}{2}-\left(\frac{3}{3}+\frac{4}{4}\right)\le x\le\frac{2}{24}-\left(\frac{1}{8}-\frac{3}{3}\right)\)
b) \(\frac{1}{2}-\frac{1}{6}\le\frac{x-2}{3}\le\frac{1}{3}-\frac{1}{2}-\frac{3}{4}\)
Tìm x nguyên biết :
\(7\frac{1}{3}\left(\frac{1}{6}-\frac{1}{2}\right)\le x\le\frac{3}{4}\left(\frac{1}{6}-\frac{1}{5}-\frac{1}{15}\right)\)
tìm x \(\in\)z
\(-4\frac{1}{3}.\left(\frac{1}{2}-\frac{1}{6}\right)\le x\le\frac{-2}{3}\left(\frac{1}{3}-\frac{1}{2}-\frac{3}{4}\right)\)
Câu hỏi 1 : Tìm x,y,z biết : x+y=-1/3 ; y+z=5/4 ; x+z= 4/3
Câu hỏi 2 : Tìm x biết : \(-\frac{4}{\frac{1}{3}}.\left(\frac{1}{2}-\frac{1}{6}\right)\le x\le\frac{2}{3}.\left(\frac{1}{3}-\frac{1}{2}-\frac{3}{4}\right)\)
Giúp ik
Câu 1,
x+y=-1/3 ; y+z=5/4 ; x+z= 4/3
=> 2(x+y+z)=9/4
=> x+y+z=9/8
Ta lại có: x+y=-1/3
=> z=9/8 -(-1/3)=35/24
Ta lại có: z+y=5/4
=> y=-5/24
=> x=.....
Câu 2:
\(-4\le x\le-\frac{11}{18}\)
