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\(\left(2x-3\right)^2=16\)
\(\Rightarrow\left(2x-3\right)^2=4^2\)
\(\Rightarrow2x-3=4\)
\(\Rightarrow2x=4+3\)
\(\Rightarrow2x=7\)
\(\Rightarrow x=\frac{7}{2}\)
1/2! +2/3! +3/4! +... + 99/100!
= (1/1! -1/2!) + (1/2! - 1/3!) + (1/3! -1/4!) + .... + (1/99! -1/100!)
=1 - 1/100! <1
1/2! +2/3! +3/4! +... + 99/100!
= (1/1! -1/2!) + (1/2! - 1/3!) + (1/3! -1/4!) + .... + (1/99! -1/100!)
=1 - 1/100! <1
-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
(2x- 3)2 = 16
=>\(\hept{\begin{cases}2x-3=4\\2x-3=-4\end{cases}}\)
=>\(\hept{\begin{cases}2x=7\\2x=-1\end{cases}}\)
=>\(\frac{ }{\hept{\begin{cases}x=3,5\\x=-0,5\end{cases}}}\)
-3/2 - 2x + 3/4 = -2
<=> -3/2 + (-2x) + 3/4 = -2
<=> (-2x) + (-3/2 + 3/4) = -2
<=> -2x + -3/4 = -2
<=> -2x = -2 + 3/4
<=> -2x = -5/4
<=> x = -5/4 : -2
<=> x = 5/8
=> x = 5/8
\(\frac{-3}{2}-2x+\frac{3}{4}=-2\)
\(< =>\frac{-3}{2}+\left(-2x\right)+\frac{3}{4}=-2\)
\(< =>\left(-2x\right)+\left(\frac{-3}{2}+\frac{3}{4}\right)=-2\)
\(< =>-2x+\frac{-3}{4}=-2\)
\(< =>-2x=-2+\frac{3}{4}\)
\(< =>-2x=\frac{-5}{4}\)
\(< =>x=\frac{-5}{4}:\left(-2\right)\)
\(< =>x=\frac{5}{8}\)
\(=>x=\frac{5}{8}\)