Các câu hỏi tương tự
Tìm x biết a) 2x+2^(x+3) =144
b) 81^(-2x)*27^x =9^5
tìm x, biết:
a. 2 . 3x - 405 = 3^x - 1
b.(1/81)^x . 27^2x = (-9)^4
Tìm x;ý biết :
a) ( x+11+y) + (x -4-y) =0
b). 81^-2x * 27^x =9^5
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:
\(a\)) \(\dfrac{2}{3}+\left(x-\dfrac{1}{2}\right)^3=\dfrac{19}{27}\)
\(b\)) \(\left(\dfrac{3}{2}\right)^{2x-1}:\left(\dfrac{27}{8}\right)^3=\dfrac{81}{16}\)
\(c\)) \(\dfrac{1}{2}.2^x+4.2^x=9.2^5\)
\(d\)) \(\text{12 - (2x +1)}^2=-69\)
Tìm x:
a)(1/3)^x=1/729
b)(1/3-1/2)^x-1 =1/36
c)81^2x . 27^x = -27
d)(x-2)^2 =1
81 mũ -2x nhân 27 mũ x = 9 mũ 5
81-2x.27x=95
(1/81)x..272x=(-9)4
Tìm x: biết 81x . 27 2x = (-9)4