(4x - 3)x =-125
x(4x−3)=−125 4x2−3x=−125 4x2−3x+125=0 x=\(\dfrac{3+\sqrt{1991\iota}}{8}\);\(\dfrac{3-\sqrt{1991\iota}}{8}\)(4x - 3)x =-125
x(4x−3)=−125 4x2−3x=−125 4x2−3x+125=0 x=\(\dfrac{3+\sqrt{1991\iota}}{8}\);\(\dfrac{3-\sqrt{1991\iota}}{8}\)bài 1:
a) (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, \(\left(x-4\right)^4=0\)
(x+1) mũ 3 = -125
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
TÌM x:(2x-1)^3=-125
Tìm x biết
a)\(\frac{27}{3x}=3\)
b) \(\left(2x-1\right)^3=-125\)
c) \(\left(x-1\right)^{x+2}=x-1^{x+4}\)
1/ tìm x,biết:
(4x-3)4=(4x-3)2
2/có hay không số hữu tỉ x thỏa mãn:
(2x+3)2+(3x-2)4=0
Bài 1: Tìm x:
\(\left(x+\dfrac{2}{3}\right)^5=\left(x+\dfrac{2}{5}\right)^3\)
Bài 2: Tìm x,y\(\in\) N biết:
\(\dfrac{27^x}{3^{2x-y}}=243\) và \(\dfrac{25^x}{5^{x+y}}=125\)