\(729=\frac{x^8}{9}\Rightarrow x^8=6561=3^8\Rightarrow x=3\)
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\(729=\frac{x^8}{9}\Rightarrow x^8=6561=3^8\Rightarrow x=3\)
\(729=\frac{x^8}{9}\)
Tìm x,biết:
a) \(\frac{x^7}{81}\) = 27
b) \(\frac{x^8}{9}\) 729
Tìm x sao cho x^8/9=729
x^7/81 = 27
x^8/9= 729
x8/9=729
tìm x
tìm x biết : a,\(\frac{x^7}{81}=27\); b,\(\frac{x^8}{9}=729\); c.\(^{\left[x-\frac{1}{2}\right]^0}\); d,\(\left[X-2\right]^2=1\); e, \(\left[2X-1\right]^3=8\); f,\(\left[X+\frac{1}{2}\right]^2\)=\(\frac{1}{16}\)
tính:\(\frac{\left(-12\right)^5.27^4-32^2.81^4}{729^4:\left(-9\right)^4.16^5:\left(-8\right)^3}\)
Tìm X biết : x^7/81 = 27. x^8/9 = 729