Question

Решите уравнение 4^x-1=4

Answer 1

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

Answer 2

4х=4+1
4х=5
х=5/4=1,25