Question

\(8^{2x+1}=2^{27}:4^6\)

\(x^{10}=x\)

\(\left(3x-1\right)^3=25\left(3x-1\right)\)

Answer 1

a) 8^2x+1 = 2^27 : 2^12 = 2^5

   2^6x.3   = 2^5

Suy ra : 6x . 3 = 5

               6x   = 5:3=5/3

                x = 5/3 : 6 = 5/18

Answer 2

b) x^10 = x thì x= 0 hoặc 1

Answer 3

c) Ta có : (3x-1)^3 = 5(3x-1)^3

   Suy ra:  3x-1 = 5(3x-1)

               3x-1 = 15x - 5

              -1+5  = 15x - 3x

               12x = 4

               x = 4 : 12 = 1/3

Answer 4

a) \(8^{2x+1}\)= 32768

    \(8^5=32768\)

\(2x+1=5\)

\(x=2\)

b)\(x=1\)

Tạm trước 2 câu