\(\frac{1}{3}+\frac{1}{4}-\frac{1}{8}\le x\le\frac{3}{4}+\frac{1}{2}+\frac{1}{6}\)
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 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) \(-4\frac{3}{5}\cdot2\frac{4}{23}\le x\le-2\frac{3}{15}:1\frac{6}{15}\)
=> \(-\frac{23}{5}\cdot\frac{50}{23}\le x\le\frac{-33}{15}:\frac{21}{15}\)
=> \(-10\le x\le\frac{-11}{7}\)
=> \(x\in\left\{-10;-9,-8,-7,-6,-5,-4,-3,-2,-1\right\}\)
\(-4\frac{1}{3}\left(\frac{1}{2}-\frac{1}{6}\right)\le x\le\frac{-2}{3}\left(\frac{1}{3}-\frac{1}{2}-\frac{3}{4}\right)\)
Ta có: \(-4\frac{1}{3}\left(\frac{1}{2}-\frac{1}{6}\right)=\frac{-13}{3}.\frac{1}{3}=-\frac{13}{9}=\frac{-26}{18}\)
\(-\frac{2}{3}\left(\frac{1}{3}-\frac{1}{2}-\frac{3}{4}\right)=\frac{-2}{3}.\frac{-11}{12}=\frac{11}{18}\)
Mà \(\frac{-26}{18}\le x\le\frac{11}{18}\)
\(\Rightarrow x=\left\{\frac{-26}{18};\frac{-25}{18};\frac{-24}{18};.....;\frac{10}{18};\frac{11}{18}\right\}\)
Tìm x:
a) \(\frac{7}{8}-\frac{1}{4}.\frac{5}{2}=\frac{x}{16}\)
b) \(\frac{4}{3}.\left(\frac{1}{6}-\frac{1}{2}\right)\le x\le\frac{2}{3}.\left(\frac{-1}{6}+\frac{3}{4}\right)\)
\(a,\frac{7}{8}-\frac{1}{4}.\frac{5}{2}=\frac{x}{16}\)
\(\frac{7}{8}-\frac{5}{8}=\frac{x}{16}\)
\(\frac{2}{8}=\frac{x}{16}\)
\(\frac{4}{16}=\frac{x}{16}\)
=> X=4
k nha
\(1\frac{13}{15}.0,75-\left(\frac{8}{15}+25\%\right).\frac{24}{47}-3\frac{12}{13}:3\)
Tìm x
\(4\frac{1}{3}.\left(\frac{1}{6}-\frac{1}{2}\right)\le x\le\frac{2}{3}.\left(\frac{1}{3}-\frac{1}{2}-\frac{3}{4}\right)\)
câu 1 : là -4
câu 2 : là -1
nếu đúng hãy cho mình 1 k đúng nhé
\(4\frac{1}{3}\times\left(\frac{1}{2}-\frac{1}{6}\right)\le x\le-\frac{2}{3}\times\left(\frac{1}{3}-\frac{1}{2}-\frac{3}{4}\right)\)
gợi ý:
Bước 1: tính bên trái và bên phải của x
Bước 2:lập luận ra để bài khó thành cơ bản
Bước 3:bn chỉ cần ghi kết quả
chú ý: Bài này lớp 6 hk nhiều r mak
chúc thành công
\(4\frac{1}{3}(\frac{1}{2}-\frac{1}{6})\le x\le-\frac{2}{3}(\frac{1}{3}-\frac{1}{2}-\frac{3}{4})\)
\(\Rightarrow\frac{13}{9}\le\frac{x}{1}\le\frac{11}{18}\)
\(\Rightarrow\frac{26}{18}\le\frac{18x}{18}\le\frac{11}{18}\)
\(\Rightarrow26\le18x\le11\)
\(\Rightarrow x=1\)
A)\(4\frac{1}{3}\left(\frac{1}{2}-\frac{1}{6}\right)\le x\le-\frac{2}{3}\left(\frac{1}{3}\cdot\frac{1}{2}-\frac{3}{4}\right)\)
\(a,4\frac{1}{3}\left[\frac{1}{2}-\frac{1}{6}\right]\le x\le-\frac{2}{3}\left[\frac{1}{3}\cdot\frac{1}{2}-\frac{3}{4}\right]\)
=> \(\frac{13}{3}\left[\frac{3}{6}-\frac{1}{6}\right]\le x\le-\frac{2}{3}\left[\frac{1}{6}-\frac{3}{4}\right]\)
=> \(\frac{13}{3}\cdot\frac{1}{3}\le x\le-\frac{2}{3}\cdot\left[\frac{2}{12}-\frac{9}{12}\right]\)
=> \(\frac{13}{9}\le x\le-\frac{2}{3}\cdot\left[-\frac{7}{12}\right]\)
=> \(\frac{13}{9}\le x\le-\frac{1}{3}\cdot\left[-\frac{7}{6}\right]\)
=> \(\frac{13}{9}\le x\le\frac{7}{18}\)
Đến đây tự tìm x
\(4\frac{1}{3}\cdot\left(\frac{1}{2}-\frac{1}{6}\right)\le x\le\frac{2}{3}\cdot\left(\frac{1}{3}-\frac{1}{2}-\frac{1}{4}\right)\)
\(4\frac{1}{3}.\left(\frac{1}{2}-\frac{1}{6}\right)\le x\le\frac{2}{3}.\left(\frac{1}{3}-\frac{1}{2}-\frac{1}{4}\right)\)
\(\Rightarrow\frac{13}{3}.\frac{1}{3}\le x\le\frac{2}{3}.\frac{-5}{12}\)
\(\Rightarrow\frac{13}{9}\le x\le\frac{-5}{18}\)
\(\Rightarrow\frac{26}{18}\le x\le\frac{-5}{18}\)
=> Không tìm được x