Tìm x biết
a)\(\frac{27}{3x}=3\)
b) \(\left(2x-1\right)^3=-125\)
c) \(\left(x-1\right)^{x+2}=x-1^{x+4}\)
tìm x biết
a) \(\dfrac{2}{5}-\left(\dfrac{1}{10}-x\right)=\left(\dfrac{-2}{5}-\dfrac{1}{2}\right)^2\)
b) \(\dfrac{2}{5}-\dfrac{3}{5}\left(x-2\right)=\left(\dfrac{-1}{2}\right)^3-\left(\dfrac{3}{4}\right)^3.\left(-2\right)^2\)
tìm x biết
a)\(x^2+x=0\)
b)\(\left(x-1\right)^{x+2}=\left(x-1\right)^{x+4}\)
HELP ME!!!!!!!!!!
Bài 1: Tìm x (dạng tìm số mũ)
Nếu a \(\ne0,a\ne\pm1\).Nếu \(^{a^m=a^n}\) thì m=n
a, \(\left(\dfrac{1}{2}\right)^m=\dfrac{1}{32}\)
b, \(-\dfrac{343}{125}=\left(-\dfrac{7}{5}\right)^n\)
c, \(2^{n+3}.2^n=128\)
Bài 2: Tìm x (dạng tìm cơ số)
a, \(x-2^{2=16}\)
b, \(\left(2x-1\right)^3=8\)
c, \(\left(4x-3\right)^3=-125\)
d, \(\left(x-4\right)^4=0\)
Tìm x:
1)\(\left(x-2\right)^3=-27\)
2)\(\left(2x-3\right)^2=25\)
3)\(3^{x-1}=\dfrac{1}{243}\)
4)\(2x+2^{x+3}=144\)
5)\(\left(2x-3\right)^2=16\)
6)\(\left(3x-2\right)^5=-243\)
7)\(\left(7x+2\right)^{-1}=3^{-2}\)
Chứng Minh Rằng
\(3^{n+3}+3^{n+1}+2^{n+3}+2^{n+2}⋮6\)
Giúp mình với
Tìm \(x\), biết :
a) \(\left(2x+3\right)^2=\dfrac{9}{121}\)
b) \(\left(3x-1\right)^3=-\dfrac{8}{27}\)
tim x
a, \(\left(3x-2\right)^2=16\)
b, \(\left(\dfrac{4}{5}x-\dfrac{3}{4}\right)^3=\dfrac{-8}{125}\)
c, \(5^{x+2}+5^x=3250\)
d, \(\left(4x-3\right)^4=\left(4x-3\right)^2\)
giup minh nhe minh dang can gap
BT4:Tìm x, biết:
a) \(x\div\left(\dfrac{3}{4}\right)^3=\left(\dfrac{3}{4}\right)^2\)
b) \(\left(\dfrac{2}{5}\right)^5\div x=\left(\dfrac{2}{5}\right)^8\)
Tìm x, biết:
a) x : \(\left(\dfrac{3}{4}\right)^3\)= \(\left(\dfrac{3}{4}\right)^2\) b) \(\left(\dfrac{2}{5}\right)^5\). x = \(\left(\dfrac{2}{5}\right)^8\)