Question

tim x

9^x-1 = 9

Answer 1

9^x-1 = 9

9^x-1 = 9¹

suy ra x-1=1

          x=1+1

           x=2

Answer 2

ta có     9^x-1=9

Suy ra   9^x-1=9^1

Suy ra   x-1=1

Suy ra x=1+1

Suy ra x=2

Vậy x=2

Answer 3

ta có:9^x-1=9

hay 9^x-1=9^1

=>x-1=1

=>x=1+1=2

Vậy x=2

Answer 4

\(9^{x-1}=9\)

\(\Rightarrow9^{x-1}=9^1\)

\(\Rightarrow x-1=1\)

\(\Rightarrow x=1+1\)

\(\Rightarrow x=2\)

Vậy \(x=2\)

Answer 5

\(9^{x-1}=9\)

\(9^{x-1}=9^1\)

\(\Rightarrow x-1=1\)

\(\Rightarrow x=2\)

vậy \(x=2\)

Answer 6

9^x-1=9

9^x-1=9¹

x-1=1

x=1+1

x=2

Vây x =2

Answer 7

\(9^{x-1}=9\)

\(9^{x-1}=9^1\)

\(\Rightarrow\)\(x-1=1\)

         \(x=1+1=2\)

Vậy x = 2