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tìm x
a/\(\dfrac{x}{2}=\dfrac{32}{x}\)
b/\(\dfrac{5}{25}=5\)
c/\(\dfrac{30^x}{27^x}=27\)
d/5x . 10x=2500
Tìm x ∈ N biết :
a) \(8< 2^x\le2^9.2^{-5}\)
b)\(27< 81^3:3^x< 243\)
c)\(\left(\dfrac{2}{5}\right)^x>\left(\dfrac{5}{2}\right)^{-3}.\left(\dfrac{-3}{5}\right)^2\)
Tìm x:a) dfrac{2}{3}+left(x-dfrac{1}{2}right)^3dfrac{19}{27}b) left(dfrac{3}{2}right)^{2x-1}:left(dfrac{27}{8}right)^3dfrac{81}{16}c) dfrac{1}{2}.2^x+4.2^x9.2^5d) text{12 - (2x +1)}^2-69
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Tìm x:
\(a\)) \(\dfrac{2}{3}+\left(x-\dfrac{1}{2}\right)^3=\dfrac{19}{27}\)
\(b\)) \(\left(\dfrac{3}{2}\right)^{2x-1}:\left(\dfrac{27}{8}\right)^3=\dfrac{81}{16}\)
\(c\)) \(\dfrac{1}{2}.2^x+4.2^x=9.2^5\)
\(d\)) \(\text{12 - (2x +1)}^2=-69\)
Bài 1:Tìm xa, dfrac{x}{6}dfrac{7}{3}b,dfrac{20}{x}dfrac{-12}{15}c,dfrac{-15}{35}dfrac{27}{x}d,dfrac{dfrac{4}{5}}{1dfrac{2}{5}}dfrac{2dfrac{2}{5}}{x}e,dfrac{x}{1dfrac{1}{4}}dfrac{1dfrac{1}{5}}{2}f,dfrac{dfrac{1}{2}}{1dfrac{1}{4}}dfrac{x}{3dfrac{1}{3}}Bài 2:Tìm xa,3x:2,7dfrac{1}{3}:2dfrac{1}{4}b,3:0,4x1:0,01c,4,5:0,32,25:0,1xd,x:27-2:3,6Bài 3:Tìm xa,1,35:0,21,25:0,1xb,3,8:2xdfrac{1}{4}:2dfrac{2}{3}c,3dfrac{1}{3}:2,40,35x:0,35d,1dfrac{1}{3}:0,8dfrac{2}{3}:0,1x ...
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Bài 1:Tìm x
a, \(\dfrac{x}{6}=\dfrac{7}{3}\)
b,\(\dfrac{20}{x}=\dfrac{-12}{15}\)
c,\(\dfrac{-15}{35}=\dfrac{27}{x}\)
d,\(\dfrac{\dfrac{4}{5}}{1\dfrac{2}{5}}=\dfrac{2\dfrac{2}{5}}{x}\)
e,\(\dfrac{x}{1\dfrac{1}{4}}=\dfrac{1\dfrac{1}{5}}{2}\)
f,\(\dfrac{\dfrac{1}{2}}{1\dfrac{1}{4}}=\dfrac{x}{3\dfrac{1}{3}}\)
Bài 2:Tìm x
a,\(3x:2,7=\dfrac{1}{3}:2\dfrac{1}{4}\)
b,\(3:0,4x=1:0,01\)
c,\(4,5:0,3=2,25:0,1x\)
d,\(x:27=-2:3,6\)
Bài 3:Tìm x
a,\(1,35:0,2=1,25:0,1x\)
b,\(3,8:2x=\dfrac{1}{4}:2\dfrac{2}{3}\)
c,\(3\dfrac{1}{3}:2,4=0,35x:0,35\)
d,\(1\dfrac{1}{3}:0,8=\dfrac{2}{3}:0,1x\)
GIÚP MÌNH VỚI NHA
Bài 2:Tìm xa) |x-2|-dfrac{3}{5}dfrac{1}{2}b) (x-dfrac{7}{3}):dfrac{-1}{3}0,4c) |x-3|5d) (2x+3)^225e) dfrac{3}{4}+dfrac{1}{4}: xdfrac{2}{5}f) (x-dfrac{1}{2})^3dfrac{1}{27}Làm nhanh giúp mik vs ạ(đang rất cần, cảm ơn nhiều ạaa!!!!!)
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Bài 2:Tìm x
a) |x-2|-\(\dfrac{3}{5}\)=\(\dfrac{1}{2}\)
b) (x-\(\dfrac{7}{3}\)):\(\dfrac{-1}{3}\)=0,4
c) |x-3|=5
d) (2x+3)\(^2\)=25
e) \(\dfrac{3}{4}\)+\(\dfrac{1}{4}\): x=\(\dfrac{2}{5}\)
f) (x-\(\dfrac{1}{2}\))\(^3\)=\(\dfrac{1}{27}\)
Làm nhanh giúp mik vs ạ(đang rất cần, cảm ơn nhiều ạaa!!!!!)
tìm x
a) x: 27=3,6
b)\(\dfrac{2x+1}{-27}\) =\(\dfrac{-3}{2x+1}\)
tính hợp lí
a,\(\dfrac{27}{2}\) x 7,5 + \(\dfrac{27}{2}\) x 2,5 -150
b,3\(^3\)x \(\dfrac{18}{5}\) - 3\(^3\) x 2\(\dfrac{2}{5}\) - 3\(^3\) x \(\dfrac{6}{5}\)
\(\left(3-x\right)^3=-\dfrac{27}{64};\left(x-5\right)^3=\dfrac{1}{-27};\left(x-\dfrac{1}{2}\right)^3=\dfrac{27}{8};\left(2x-1\right)^2=\dfrac{1}{4};\left(2-3x\right)^2=\dfrac{9}{4};\left(1-\dfrac{2}{3}\right)^2=\dfrac{4}{9}\)
Tìm x:
a) \(\dfrac{x-1}{-15}=\dfrac{-60}{x-1}\)
b) \(\left|x+\dfrac{4}{5}\right|+\dfrac{3}{5}=\dfrac{2}{5}\)
c) \(\left(x-\dfrac{1}{2}\right)^3=\dfrac{1}{27}\)