1. \(2+1\frac{1}{3}\)< x < \(1\frac{3}{7}+3\frac{1}{7}\)
=> \(3\frac{1}{3}\) < x < \(4\frac{4}{7}\)
=> x = 4
2. \(\frac{1}{2}+\frac{1}{3}+\frac{1}{6}\le\)x\(\le3\frac{1}{4}+1\frac{3}{4}\)
=> 1 \(\le\) x \(\le5\)
=> x thuộc {1; 2; 3; 4; 5}.
Câu hỏi : Tìm số nguyên x biết : \(\left(-\frac{2}{3}-\frac{1}{2}\right):-\frac{1}{4}\le x\le\left(-\frac{5}{6}+\frac{2}{\frac{1}{4}}:-\frac{3}{2}\right).\left(-\frac{7}{\frac{1}{2}}\right)\)
Giúp ik
Tìm số nguyên x
a) \(\frac{1}{3}+\frac{-2}{5}+\frac{1}{6}+\frac{-1}{5}\le x< \frac{-3}{4}+\frac{2}{7}+\frac{-1}{4}+\frac{3}{5}+\frac{5}{7}\)
b)\(\frac{5}{17}+\frac{-9}{4}+\frac{-26}{31}+\frac{12}{17}+\frac{-11}{31}< \frac{x}{9}\le\frac{-3}{7}+\frac{7}{15}+\frac{4}{-7}+\frac{8}{15}\)
bài 1:
tìm n biết: 5n+7 chia hết 3n+2
bài 2:
1, tìm chữ số tận cùng của:
a,57^1999
b,93^1999
2, Cho A= 999993^1999 - 555557^1997
chứng minh rằng: A chia hết cho 5
bài 3:chứng minh rằng:
a) \(\frac{1}{2}-\frac{1}{4}+\frac{1}{8}-\frac{1}{16}+\frac{1}{32}-\frac{1}{64}< \frac{1}{3}\)
b)\(\frac{1}{3}-\frac{2}{3^2}+\frac{3}{3^3}-\frac{4}{3^4}+...+\frac{99}{3^{99}}-\frac{100}{3^{100}}< \frac{3}{16}\)
Bài 5:Tìm x biết:
a)11.(x-6)=4.x+11
b)\(4\frac{1}{3}.\left(\frac{1}{6}-\frac{1}{2}\right)\le x\le\frac{2}{3}.\left(\frac{1}{2}-\frac{1}{3}-\frac{1}{4}\right)\)với x\(\in\)Z
c)|x-3|+1=x
1 tìm x biết ;
a, 0-|x + 1| = 5
b, 2 - | \(\frac{3}{4}\)- x | = \(\frac{7}{12}\)
c, 2 | \(\frac{1}{2}\)x - \(\frac{1}{3}\)| - \(\frac{3}{2}\)= \(\frac{1}{4}\)
d, | x - \(\frac{1}{3}\)| = \(\frac{5}{6}\)
e, \(\frac{3}{4}\)- 2 | 2x - \(\frac{2}{3}\)| = 2
f, \(\frac{2x-1}{2}\)= \(\frac{5+3x}{3}\)
1 tìm x biết ;
a, 0-|x + 1| = 5
b, 2 - | \(\frac{3}{4}\)- x | = \(\frac{7}{12}\)
c, 2 | \(\frac{1}{2}\)x - \(\frac{1}{3}\)| - \(\frac{3}{2}\)= \(\frac{1}{4}\)
d, | x - \(\frac{1}{3}\)| = \(\frac{5}{6}\)
e, \(\frac{3}{4}\)- 2 | 2x - \(\frac{2}{3}\)| = 2
f, \(\frac{2x-1}{2}\)= \(\frac{5+3x}{3}\)
Bài 1: Tìm x biết
d / \(\frac{2}{3}.\left(\frac{1}{2}+\frac{3}{4}-\frac{1}{3}\right)\le\frac{x}{18}\le\frac{7}{3}.\left(\frac{1}{3}-\frac{1}{6}\right)\)
Giari chi tiết mình like cho .
Bài 17: Tìm x \(\in\)Z biết:
\(\frac{2}{3}\times\left(\frac{1}{2}+\frac{3}{4}-\frac{1}{3}\right)\le\frac{x}{18}\le\frac{7}{3}\times\left(\frac{1}{2}-\frac{1}{6}\right)\)
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, biết:
\(4\frac{1}{3}.\left(\frac{1}{6}-\frac{1}{2}\right)\le x\le\frac{2}{3}.\left(\frac{1}{3}-\frac{1}{2}-\frac{3}{4}\right)\)
