Question

Tìm x, biết:

5^{x - 1} - 13 = 612

 

Answer 1

5^{x - 1} - 13 = 612

5^{x - 1} = 612 + 13

5^{x - 1} = 625

5⁴ = 625

x = 4 + 1

x = 5

Answer 2

\(5^{x-1}-13=612\)

\(5^{x-1}=612+13\)

\(5^{x-1}=625\)

\(5^{x-1}=5^4\)

\(x-1=4\)

\(x=4+1\)

\(x=5\)