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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:
\(a\)) \(\dfrac{2}{3}+\left(x-\dfrac{1}{2}\right)^3=\dfrac{19}{27}\)
\(b\)) \(\left(\dfrac{3}{2}\right)^{2x-1}:\left(\dfrac{27}{8}\right)^3=\dfrac{81}{16}\)
\(c\)) \(\dfrac{1}{2}.2^x+4.2^x=9.2^5\)
\(d\)) \(\text{12 - (2x +1)}^2=-69\)
\(\left(3-x\right)^3=-\dfrac{27}{64};\left(x-5\right)^3=\dfrac{1}{-27};\left(x-\dfrac{1}{2}\right)^3=\dfrac{27}{8};\left(2x-1\right)^2=\dfrac{1}{4};\left(2-3x\right)^2=\dfrac{9}{4};\left(1-\dfrac{2}{3}\right)^2=\dfrac{4}{9}\)
1)tim x bit a)(1/2-1/3).6^x+6^x+2=6^15+6^18
b)3^x+3^x+2=2430
c)(2x-15)^5=(2x-15)^3
2) so saanh
a)2^11 va 5^35
b)2^31 va 3^21
c)2^15 va 27^5.49^8 d)21^15 va 27^5.49^8
A)(2X+3)^2=9/121
B)(3X-1)^3=-8/27
3x+1= 27
(2x-1)3=8
LK
1 tháng 7 2023 lúc 8:09
(2x - 1)3 = \(\dfrac{8}{27}\)
Tìm x, biết :
a, ( 1 - 2x ) ^ 3 = - 8
b, ( 2x - 1 ) ^ 3 = - 27
Tìm x
(x -1)3=27
x2+x=0
(2x+1)2=25
(2x-3)2=36
(x-1)x+2=(x-1)x+4
(2x-1)3=-8
tìm x biết
a,[x-1]^3=27
b, x^2+x=0
c,[2x=1]=25
d,[2x-3]^2=36
e,5^x+2=625
f,[x-1]^x+2=[x-1]^x+4
g,[2x-1]^3=8