\(\left(x+3\right)\left(2x-4\right)< 0\)
\(\Leftrightarrow-3< x< 2\)
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tìm tập các giá trị của x biết
a) (x-1)(x-2)0 b) 2x-30 c) (2x-4)(9-3x)0
d)frac{2x}{3}frac{3}{4}0 e) left(frac{3}{4}-2xright)left(frac{-3}{5}+frac{2}{-61}-frac{17}{51}right) ≤0 f)left(frac{3}{2x}-4right)frac{5}{3} frac{15}{6}
Giúp mình với mai mình nộp bài rồi
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tìm tập các giá trị của x biết
a) (x-1)(x-2)>0 b) 2x-3<0 c) (2x-4)(9-3x)>0
d)\(\frac{2x}{3}=\frac{3}{4}\)>0 e) \(\left(\frac{3}{4}-2x\right)\left(\frac{-3}{5}+\frac{2}{-61}-\frac{17}{51}\right)\) ≤0 f)\(\left(\frac{3}{2x}-4\right)\frac{5}{3}\) >\(\frac{15}{6}\)
Giúp mình với mai mình nộp bài rồi
Tìm x, biết
a, \(\dfrac{3}{7}+\dfrac{4}{7}x=\dfrac{1}{3}\)
b, \(25-\left(5-x\right)=-7\)
c, \(\dfrac{3}{4}+\dfrac{1}{4}:x=\dfrac{2}{5}\)
d, \(2x\left(x-\dfrac{1}{7}\right)=0\)
e, \(\left|\dfrac{1}{2}x-\dfrac{3}{4}\right|-7=-3\)
Tìm x biết
a)left(3x+dfrac{1}{3}right)left(x-dfrac{1}{2}right)0
b)left(x-dfrac{3}{2}right)left(2x+1right)0
c)left(2-xright)left(dfrac{4}{5}-xright) 0
d)left(x-dfrac{4}{7}right):left(x+dfrac{1}{2}right)0
e)2left(x+1right)-dfrac{1}{3}.left(x-1right)dfrac{2}{3}
k)left|4x-0,2right|0,2
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Tìm x biết
a)\(\left(3x+\dfrac{1}{3}\right)\left(x-\dfrac{1}{2}\right)=0\)
b)\(\left(x-\dfrac{3}{2}\right)\left(2x+1\right)>0\)
c)\(\left(2-x\right)\left(\dfrac{4}{5}-x\right)< 0\)
d)\(\left(x-\dfrac{4}{7}\right):\left(x+\dfrac{1}{2}\right)>0\)
e)\(2\left(x+1\right)-\dfrac{1}{3}.\left(x-1\right)=\dfrac{2}{3}\)
k)\(\left|4x-0,2\right|=0,2\)
Tìm x, biết
a.dfrac{2}{3}x-dfrac{1}{2}x (dfrac{-7}{12}) . dfrac{7}{5}
b.(dfrac{1}{5} - dfrac{3}{2}x)^2 dfrac{9}{4}
c. (1,25 - dfrac{4}{5}x)^3 -125
d. 2^x + 2^{x+4} 544
e.dfrac{3}{4}x - 4,5+ dfrac{4}{5}x 3
g. left|3x-2right| left|2x-3right|
h.(x2 -4)sqrt{x} 0
i. (dfrac{1}{3}x - 4 )2 dfrac{16}{25}
j.4x2 -1 0
k.2x2+0,82 1
l.dfrac{5}{12}sqrt{x} - dfrac{1}{6} dfrac{1}{3}
m.(sqrt{x-1} + 5)(x-6sqrt{x} 0
Đọc tiếp
Tìm x, biết
a.\(\dfrac{2}{3}\)x-\(\dfrac{1}{2}\)x = (\(\dfrac{-7}{12}\)) . \(\dfrac{7}{5}\)
b.(\(\dfrac{1}{5}\) - \(\dfrac{3}{2}\)x)\(^2\) = \(\dfrac{9}{4}\)
c. (1,25 - \(\dfrac{4}{5}\)x)\(^3\) = -125
d. 2\(^x\) + 2\(^{x+4}\) = 544
e.\(\dfrac{3}{4}\)x - 4,5+ \(\dfrac{4}{5}\)x = 3
g. \(\left|3x-2\right|\) =\(\left|2x-3\right|\)
h.(x2 -4)\(\sqrt{x}\) = 0
i. (\(\dfrac{1}{3}\)x - 4 )2 = \(\dfrac{16}{25}\)
j.4x2 -1 = 0
k.2x2+0,82 =1
l.\(\dfrac{5}{12}\)\(\sqrt{x}\) - \(\dfrac{1}{6}\) = \(\dfrac{1}{3}\)
m.(\(\sqrt{x-1}\) + 5)(x-6\(\sqrt{x}\) = 0
a) dfrac{2}{3}x + 0,25 -dfrac{5}{8} - left(dfrac{1}{2}-dfrac{3}{4}xright)
b) ( 9x^2 -1 ) . ( 2x + 3 ) 0
c) left|2x-dfrac{1}{3}right|-dfrac{3}{4}left|-dfrac{5}{6}right|
d) left(0,75-dfrac{5}{6}xright)^3 -dfrac{27}{64}
e) left(dfrac{2}{5}x-dfrac{1}{2}right)^2dfrac{9}{16}
f) dfrac{2x-3}{3}dfrac{3x+2}{7}
h)left(dfrac{2}{3}right)^{2x+1} left(dfrac{8}{27}right)^3
i) 2.5^{3x}+5^{3x+2}3375
Đọc tiếp
a) \(\dfrac{2}{3}\)x + 0,25 = \(-\dfrac{5}{8}\) - \(\left(\dfrac{1}{2}-\dfrac{3}{4}x\right)\)
b) ( \(9x^2\) -1 ) . ( 2x + 3 ) = 0
c) \(\left|2x-\dfrac{1}{3}\right|-\dfrac{3}{4}=\left|-\dfrac{5}{6}\right|\)
d) \(\left(0,75-\dfrac{5}{6}x\right)^3\) = \(-\dfrac{27}{64}\)
e) \(\left(\dfrac{2}{5}x-\dfrac{1}{2}\right)^2=\dfrac{9}{16}\)
f) \(\dfrac{2x-3}{3}=\dfrac{3x+2}{7}\)
h)\(\left(\dfrac{2}{3}\right)^{2x+1}\) = \(\left(\dfrac{8}{27}\right)^3\)
i) \(2.5^{3x}+5^{3x+2}=3375\)
mn giúp mk vs
a)\(\dfrac{x-3}{4}=\dfrac{4}{x=3}\)
b)(x-1);5=(2x+1):3
c)\(\dfrac{37-x}{x+13}=\dfrac{3}{7}\)
d)\(\dfrac{x-1}{x+2}=\dfrac{x-2}{x+1}\)
e) \(\dfrac{x+4}{20}=\dfrac{5}{x+4}\)
a) Tính giá trị biểu thức sau:
dfrac{9^4.8^6}{6^{10}.16^3}
b) Tìm x:
1/ left(dfrac{4}{5}x-1right).left(6x+dfrac{1}{2}right)0
2/
left(2x+1right)^225
3/
x:8,50,69:(-1,15)
4/
3(3x+5)-2(6-2x)10
5/
sqrt{x}2,5
6/
3^{X-1}+5.3^{x-1}162
7/
dfrac{X-5}{1}+dfrac{X-5}{2}+dfrac{X-5}{3}+dfrac{X-5}{4}0
Đọc tiếp
a) Tính giá trị biểu thức sau:
\(\dfrac{9^4.8^6}{6^{10}.16^3}\)
b) Tìm x:
1/ \(\left(\dfrac{4}{5}x-1\right).\left(6x+\dfrac{1}{2}\right)=0\)
2/
\(\left(2x+1\right)^2=25\)
3/
x:8,5=0,69:(-1,15)
4/
3(3x+5)-2(6-2x)=10
5/
\(\sqrt{x}=2,5\)
6/
\(3^{X-1}+5.3^{x-1}=162\)
7/
\(\dfrac{X-5}{1}+\dfrac{X-5}{2}+\dfrac{X-5}{3}+\dfrac{X-5}{4}=0\)
tìm x biết
1)left(1-2xright)^29
2)left(x+5right)^3-64
3)left(3x-5right)^216
4) left(x-1right)^327
5)x^2+x0
6)5^{x+2}625
7) 5-left|3x-1right|3
8) left|2x-1right|+54
9)left|dfrac{1}{3}-xright|-1dfrac{2}{3}
Đọc tiếp
tìm x biết
1)\(\left(1-2x\right)^2=9\)
2)\(\left(x+5\right)^3=-64\)
3)\(\left(3x-5\right)^2=16\)
4) \(\left(x-1\right)^3=27\)
5)\(x^2+x=0\)
6)\(5^{x+2}=625\)
7) \(5-\left|3x-1\right|=3\)
8) \(\left|2x-1\right|+5=4\)
9)\(\left|\dfrac{1}{3}-x\right|-1=\dfrac{2}{3}\)
a)3,6-left|x-0,4right|0
b)frac{x}{2}yfrac{z}{3} và x-2y+z210
c)left|x+0,25right|-4frac{1}{4}
d)x:left(0,25right)^4left(0,5right)^2
e)3^{x-1}+5.3^{x-1}162
f)frac{x}{-25}frac{2}{5}
g)left|x+frac{3}{4}right|-frac{3}{4}sqrt[]{frac{1}{9}}
Đọc tiếp
a)\(3,6-\left|x-0,4\right|=0\)
b)\(\frac{x}{2}=y=\frac{z}{3}\) và \(x-2y+z=210\)
c)\(\left|x+0,25\right|-4=\frac{1}{4}\)
d)\(x:\left(0,25\right)^4=\left(0,5\right)^2\)
e)\(3^{x-1}+5.3^{x-1}=162\)
f)\(\frac{x}{-25}=\frac{2}{5}\)
g)\(\left|x+\frac{3}{4}\right|-\frac{3}{4}=\sqrt[]{\frac{1}{9}}\)