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\(5^x+5^{x+2}=650\)
\(\Rightarrow5^x+5^x.5^2=650\)
\(\Rightarrow5^x+5^x.25=650\)
\(\Rightarrow5^x.\left(1+25\right)=650\)
\(\Rightarrow5^x.26=650\)
\(\Rightarrow5^x=650:26\)
\(\Rightarrow5^x=25\)
\(\Rightarrow x=2\)
Vậy \(x=2\)
Chúc bạn học tốt !!!
a, 5^x + 5^x + 2 = 650
=> 2.5^x + 2 = 650
=> 2.5^x = 648
=> 5^x = 324
chúc bạn hok tốt
5^x+5^x+2=650
=>5^x.(1+5^2)=650
=>5^x.26=650
=>5^x=650:26=25
=>5^x=5^2
=>x=2
\(5^x+5^{x+2}=650\)
\(\Rightarrow5^x+5^x.5^2=650\)
\(\Rightarrow5^x\left(1+25\right)=650\)
\(\Rightarrow5^x.26=650\)
\(\Rightarrow5^x=650:26\)
\(\Rightarrow5^x=25\)
\(\Rightarrow5^x=5^2\)
\(\Rightarrow x=2\)
Vậy x = 2
5x-3 + 52 = 650
5x-3 = 650 - 52
5x-3 = 625
5x-3 = 54
<=> x - 3 = 4
x = 4 + 3
x = 7
\(\Leftrightarrow5^x\left(1+5^2\right)=650\)
\(\Leftrightarrow5^x26=650\)
\(\Leftrightarrow5^x=25\)
\(\Leftrightarrow5^x=5^2\)
<=> x = 2
5x + 5x+2 = 650
5x + 5x . 52 = 650
5x . (1 + 52) = 650
5x = 650 : 26
5x = 52
x = 2
a,5x + 5x + 2 = 650
=> 5x+5x.52=650
=> 5x.(1+25)=650
=> 5x=52
=> x=2
3x - 1 + 5 . 3x - 1 = 162
3x-1.(1+5)=162
=> 3x-1=27
=> 3x-1=33
=> x-1=3
=> x=4
5 x + 5 x + 2 = 650 3x - 1 + 5 . 3x - 1 = 162
5 x( 1 + 5 2 ) = 650 3x - 1 ( 5 + 1 ) = 162
5 x = 25 3x - 1 = 27
\(\Rightarrow\)x = 2 \(\Rightarrow\)x - 1 = 3
\(\Rightarrow\)x = 4
\(5^x+5^{x+2}=650\)
\(5^x+5^x.5^2=650\)
\(5^x.\left(1+5^2\right)=650\)
\(5^x.26=650\)
\(5^x=650:26\)
\(5^x=25\)
\(5^x=5^2\)
\(\Rightarrow x=2\)
\(5^x+5^{x+2}=650\)
\(\Leftrightarrow5^x+5^x.5^2=650\)
\(\Leftrightarrow5^x.\left(1+5^2\right)=650\)
\(\Leftrightarrow5^x.26=650\)
\(\Leftrightarrow5^x=25\)
\(\Leftrightarrow5^x=5^2\)
\(\Leftrightarrow x=2\)
Vậy x=2
\(5^x+5^{x+2}=650\)
\(\Leftrightarrow5^x.1+5^x.5^2=650\)
\(\Leftrightarrow5^x\left(1+5^2\right)=650\)
\(\Leftrightarrow5^x\left(1+25\right)=650\)
\(\Leftrightarrow5^x.26=650\)
\(\Leftrightarrow5^x=650\div26\)
\(\Leftrightarrow5^x=25\)
\(\Leftrightarrow5^x=5^2\)
\(\Leftrightarrow x=2\)
Vậy x = 2