[Toán 7] Luỹ thừa

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nhung6b5a1

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thaotran19

$2^{x+1}. 3^y = 12^x2^x.2.3^y=12^x
2.3^y=$$\dfrac{12^x}{2^x}$
$6^y=6^x
=> x=y=1$
 
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