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\(\left[\frac{139}{84}-\frac{577}{924}-\frac{98}{205}\right].\frac{2197}{27}\)
\(\left[\frac{34}{33}-\frac{98}{205}\right]\frac{2197}{27}\)
\(\frac{3736}{6765}.\frac{2197}{27}=44,93713285\)
Ta có :\(\left(\frac{3}{2}-\frac{5}{11}-\frac{3}{13}\right).\left(2x-2\right)=\left(-\frac{3}{4}+\frac{5}{22}+\frac{3}{26}\right)\)
=> \(\left(\frac{3}{2}-\frac{5}{11}-\frac{3}{13}\right).\left(2x-2\right)=-\frac{1}{2}\left(\frac{3}{2}-\frac{5}{11}-\frac{3}{13}\right)\)
=> \(2x-2=-\frac{1}{2}\)
=> \(2x=\frac{3}{2}\)
=> \(x=\frac{3}{4}\)
-2/5x-1/3=3/4
-2/5x=3/4+1/3
-2/5x = 13/12
x=13/12:2/5
x=-65/24
-13/20x+1/2=-2/5
-13/20x=-2/5-1/2
-13/20x=-9/10
x=-9/10:13/20
x=-18/13
4/3-|2x-1/2|=1
|2x-1/2|=1-4/3
|2x-1/2|=-1/3
<=> 2x-1/2=1/3 hoặc 2x-1/2=-1/3
TH1:
2x-1/2=1/3
2x=1/3+1/2
2x=5/6
x=5/6:2
x=5/12
TH2:
2x-1/2=-1/3
2x=-1/3+1/2
2x=1/6
x=1/6:2
x=1/12
=6/15x(-9/6-20/6)
=6/15x[-(9/6+20/6)]
=6/15x(-29/6)
=-174/90
=-29/15
a: 2x-3/2+3/4=-4
=>2x-3/4=-4
=>2x=-13/4
hay x=-13/8
b: \(\left(-\dfrac{2}{3}x-\dfrac{3}{5}\right)\cdot\left(\dfrac{-3}{2}-\dfrac{10}{3}\right)=\dfrac{2}{5}\)
\(\Leftrightarrow-\dfrac{2}{3}x-\dfrac{3}{5}=\dfrac{2}{5}:\dfrac{-29}{6}=\dfrac{-2}{5}\cdot\dfrac{6}{29}=\dfrac{-12}{145}\)
=>2/3x+3/5=12/145
=>2/3x=-15/29
hay x=-45/58
c: \(\dfrac{x}{2}-\left(\dfrac{3}{5}x-\dfrac{13}{5}\right)=-\left(\dfrac{7}{10}x+\dfrac{7}{5}\right)\)
=>1/2x-3/5x+13/5=-7/10x-7/5
=>-1/10x+7/10x=-7/5-13/5
=>3/5x=-2
hay x=-2:3/5=-10/3
a. [ -2/3 + 3/7 ] : 4/5 + [ -1/3 + 4/7 ] : 4/5 = 0
b. 5/9 : [ 1/11 - 5/22 ] + 5/9 : [ 1/15 - 2/3 ] = -5
HT/nhớ k cho tôi nha
Ai làm xong sớm nhất tui k cho
Bài 1:
b) Ta có: \(D=\dfrac{-5}{10}\cdot\dfrac{-4}{10}\cdot\dfrac{-3}{10}\cdot...\cdot\dfrac{3}{10}\cdot\dfrac{4}{10}\cdot\dfrac{5}{10}\)
\(=\dfrac{-5}{10}\cdot\dfrac{-4}{10}\cdot\dfrac{-3}{10}\cdot...\cdot0\cdot...\cdot\dfrac{3}{10}\cdot\dfrac{4}{10}\cdot\dfrac{5}{10}\)
=0
trả lời
(3/2-5/11-3/13)+(3/-4+5/22+3/26)=0,407...
chúc bn
hc tốt
trả lời
(3/2-5/11-3/13)+(3/-4+5/22+3/26)=0,40734265734
chúc bn
hc tốt