Question

Tìm X, biết:

(2 mũ X +2) x81 =3 mũ 5

Answer 1

( 2^x  + 2 ) . 81 = 3⁵

( 2^x + 2 ) . 81 = 243

 2^x + 2           = 243 : 81 

2^x + 2            = 3

2^x                  = 3 - 2 

2^x                  = 1

=> x = 0 

Answer 2

( 2^x + 2 ) x 81 = 3⁵

( 2^x + 2 ) . 81 = 243

2^x + 2 = 243 : 81

2^x + 2 = 3

2^x = 3-2

2^x = 1

=> x = 0

Answer 3

(2 mu x + 2) x 81 =3 mu 5

  ( 2 mu x + 2 )x 81 =243

2mu x + 2 = 243:81

2 mux + 2=3

 2mu x = 3 - 2

2 mux =1

x= 1

Answer 4

xin loi x = 0 nhe