Question

10^n -1=3798 . Find value of n

Answer 1

$find \: the \: value \: ofn \: \: \: 10 n - 1 = 3798 \\ \\ 10n - 1 = 3798 \\ 10n = 3797 \\ n = 10 \div 3797 \\ n = 379.7$