Question

Bài1: tìm x,biết: a, 2^x=8^4/16^3  b,2^x=2^6/4^3  C,2^x-3/4^10=8^3

 

 

 

Answer 1

a, 2^x=8^4/16^3 

<=> 2^x = (2^3)^4 / (2^4)^3

<=> 2^x = 2^12 / 2^12

<=> 2^x = 1

<=> 2^x = 2^0

<=> x = 0

Vậy x = 0

Answer 2

 b,2^x=2^6/4^3

<=> 2^x = 2^6 / (2^2)^3

<=> 2^x = 2^6 / 2^6

<=> 2^x = 1

<=> 2^x = 2^0

<=> x = 0

Vậy x = 0