ta có -5= -125
=> 4x -3 =-5
=>4x= -2
=>x=-1/2
ta có -5= -125
=> 4x -3 =-5
=>4x= -2
=>x=-1/2
(4x - 3)x =-125
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
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, \(\left(x-4\right)^4=0\)
bài 1:
a) (\(-\dfrac{1}{2}\))3 + (\(\dfrac{5}{6}\))0 - (\(-\dfrac{3}{2}\))2-(-1)10
b) 4(\(-\dfrac{1}{3}\))0 - 2(\(-\dfrac{1}{2}\))2+3(\(-\dfrac{1}{2}\))+1
Bài 2:
a)(4x - 3)x=-125
(x+1) mũ 3 = -125
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:(2x-1)^3=-125
tính: a)(-1)x(-1)^2x(-1)^3x(-1)^4x...x(-1)^9x(-1)^10
b)[1/100-1^2]x[1/100-(1/2)^2]x[1/100-(1/3)^2]x...x[1/100-(1/20)^2]
Bài 1: Tìm x
a) \(\left(x-2\right)^4=256\)
b) \(\frac{x^4}{256}=81\)
c) \(125\left(x+\frac{4}{5}\right)^3=729\)
e) \(7^x+2+7x=50\)
f) \(9.13^{x-1}+\frac{4}{169}.13^{x+1}=2197\)