3^x.3^x+3=27
=>3^2x+3=27=3^3
=>2x+3=3
=>2x=3-3=0
=>x=0
\(3^x\cdot3^{x+3}=27\)
\(3^{x+x+3}=27\)
\(3^{2x+3}=3^3\)
\(2x+3=3\)
\(2x=0\)
\(x=0\)
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 \(\dfrac{6}{5}\)
\(\dfrac{3^{x-5}+3^{x-4}+3^{x-3}}{13}=^{\dfrac{27}{3^x}}\)
tìm x
3x /27=27
9x-1 =1/9
32/2x=4
27/3x=3
9x:3x=32015
2 x 3x + 3x-1=7-(32+ 2 x 62)
7x+2 + 2 x 7x-1=345
viết các biểu thức sau dưới dạng lũy thừa
a) 9 x 3 mũ 2 x 1/81 x 27
b) 4x32 :(2 mũ 3 x 1/16)
c)3 mũ 4 x 3 mũ 5 : 1/27
d) 81 mũ 11 x 3 mũ 17 / 27 mũ 10 x 9 mũ 15
Tính tổng M= 5 4/23 x 27 3/27 + 4 3/27 x (-5 4/23)
Tìm x biết
\(|x+\frac{1}{3}|+\frac{4}{5}=|\left(-3,2\right)+\frac{2}{5}|+\left(27-\frac{3}{5}\right)\left(27-\frac{3^2}{6}\right)\left(27-\frac{3^3}{7}\right)...\left(27-\frac{3^{2010}}{2014}\right)\)
tìm x:
\(|x+\frac{1}{3}|+\frac{4}{5}=|\left(-3,2\right)+\frac{2}{5}|+\left(27-\frac{3}{5}\right)\left(27-\frac{3^2}{7}\right)\left(27-\frac{3^3}{7}\right)...\left(27-\frac{3^{2010}}{2014}\right)\)
\(\left(3-x\right)^3=-\dfrac{27}{64};\left(x-5\right)^3=\dfrac{1}{-27};\left(x-\dfrac{1}{2}\right)^3=\dfrac{27}{8};\left(2x-1\right)^2=\dfrac{1}{4};\left(2-3x\right)^2=\dfrac{9}{4};\left(1-\dfrac{2}{3}\right)^2=\dfrac{4}{9}\)
(3/5)mũ 5 . x = (3/7)mũ 7
(-1/3)mũ 3 . x = 1/81
(x - 1/2) mũ 3 = 1/27
(3x + 1)mũ 3 = -27
(x + 1/2) mũ 4 = 16/81
(4/5) mũ 5.x = (4/5) mũ 7
1/9 x 27 mũ x = 3 mũ x
1/3 mũ 2 x 3 mũ 4 x 3 mũ n = 3 mũ 7
