Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(a,4^{2x-6}=1\)\(\Leftrightarrow2x-6=0\Leftrightarrow2x=6\Rightarrow x=3\)
\(b,2^{2x-1}=16\Rightarrow2^{2x-1}=2^4\)
\(\Rightarrow2x-1=4\Rightarrow2x=5\Rightarrow x=\frac{5}{2}\)
\(c,5< 5^x< 125\Rightarrow5^1< 5^x< 5^3\)\(\Rightarrow1< x< 3\)
\(d,5^{x+1}=125\Rightarrow5^{x+1}=5^3\Rightarrow x+1=3\Rightarrow x=2\)
\(a,4^{2x-6}=1\)
\(4^{2x-6}=4^0\)
\(\Rightarrow2x-6=0\)
\(\Rightarrow2x=6\Leftrightarrow x=3\)
\(b,2^{x-1}=16\)
\(2^{x-1}=2^4\)
\(\Rightarrow x-1=4\)
\(\Rightarrow x=5\)
a) 3x-5=4
3x = 4+5
3x=9
=> 9 = 3x = 32
<=> x=2
b) 5x-2 = 125
=> 5x-2 = 53
<=> x-2 = 3
x = 3+2
x = 5
c) x3 = 8
<=> x3 = 8 = 23
<=> x= 2
d) (x-1)3 = 125
=> x-1 = 5
x = 5+1
x = 6
a) 3^x-5=4
=>3^x =9
=>3^x =3^2
=> x = 2
b)5^x-2=125
=>5^x-2=5^3
=>x-2=3
=>x =5
a) \(5^{x+1}=125=5^3\)
\(\Rightarrow x+1=3\Rightarrow x=2\)
b) \(\left(x-16\right)^2=9=3^2\)
\(\Rightarrow x-16=3\Rightarrow x=19\)
d) \(\left(x-1\right)^2=\left(x-1\right)^3\)
\(\Rightarrow\orbr{\begin{cases}x-1=0\\x-1=1\end{cases}\Rightarrow\orbr{\begin{cases}x=1\\x=2\end{cases}}}\)
\(a,x.3^7=3^{15}< =>x=\frac{3^{15}}{3^7}=3^8\)
\(b,x:125=5^{12}< =>x=5^{12}.5^3=5^{15}\)
\(c,4^{2x-1}=64< =>4^{2x-1}=4^3< =>2x-1=3< =>x=\frac{3+1}{2}=\frac{4}{2}=2\)
a)5x+1=125
=>5x+1=53
=>x+1=3
=>x=2
vậy x=2
b)42x+1=64
=>42x+1=43
=>2x+1=3
=>x=1
vậy x =1
e)=>43x+2017=42020-3
=>3x+2017=2017
=>x=0
vậy x=0
f)=>2x+2x x 23=144
=>2x x (1+23)=144
=>2x x 9=144
=>2x=16
=>2x=24
=>x=4
vậy x=4
`(x+1)^3 = 125`
`=> (x+1)^3 = 5^3`
`=> x + 1 = 5`
`=> x = 4`
Vậy ...
minh cam on a