2x+2-2x=96
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a. 96 : 8 : 2 = 6
96 : ( 8 x 2 ) = 6
96 : 8 : 2 = 96 : ( 8 x 2 )
b. 81 : 9 : 3 = 3
81 : ( 9 x 3 ) = 3
81 : 9 : 3 = 81 : ( 9x 3)
2x+2-2x=96
=>2x\(\cdot\)22-2x=96
=>2x(22-1)=96
=>2x\(\cdot\)3=96
=>2x=96:3=32=25
=>x=5
Vậy x=5
`@` `\text {Ans}`
`\downarrow`
\(2^{x+2}-2^x=96?\)
`\Rightarrow 2^x . 2^2 - 2^x = 96`
`\Rightarrow 2^x . (2^2 - 1) = 96`
`\Rightarrow 2^x . 3 = 96`
`\Rightarrow 2^x = 96 \div 3`
`\Rightarrow 2^x =32`
`\Rightarrow 2^x = 2^5`
`\Rightarrow x = 5`
Vậy, `x = 5.`
\(2^{x+2}-96=2^x\)\(\Leftrightarrow2^{x+2}-2^x=96\)
\(\Leftrightarrow2^x\left(2^2-1\right)=96\)\(\Leftrightarrow2^x.3=96\)
\(\Leftrightarrow2^x=32=2^5\)\(\Leftrightarrow x=5\)
Vậy \(x=5\)
\(2^{x+2}-2^x=96\)
\(\Leftrightarrow2^x\cdot2^2-2^x=96\)
\(\Leftrightarrow2^x\left(2^2-1\right)=96\)
\(\Leftrightarrow2^x\cdot3=96\)
\(\Leftrightarrow2^x=96\div3\)
\(\Leftrightarrow2^x=32\)
\(\Leftrightarrow2^x=2^5\)
\(\Leftrightarrow x=5\)
Vậy x = 5
2^(x+2) - 2^x = 96
<=> (2^x)(2^2) -2^x = 96
(2^x)[(2^2) -1)] = 96
2^x = 96/3 = 32
2^5 = 32
Đáp số:
x = 5
chúc bn hok tốt
\(2^{x+2}-2^x=96\)
\(2^x.\left(2^2-1\right)=96\)
\(2^x.3=96\)
\(2^x=32\)
\(2^x=2^5\)
\(\Rightarrow x=5\)
\(2^{x+2}-2^x=96\)
\(2^x\left(2^2-1\right)=96\)
\(2^x\left(4-1\right)=96\)
\(2^x\cdot3=96\)
\(2^x=96:3\)
\(2^x=32\)
\(2^x=2^5\)
\(x=5\)
`2^(x+2)-2^x =96`
`=>2^x (2^2-1)=96`
`=>2^x . 3=96`
`=>2^x=96:3`
`=>2^x=32`
`=>2^x=2^5`
`=>x=5`