Question

va rog cat mai repede dau coroana ​

Answer 1

c)

$log_{10}( \sqrt{75 + {5}^{ \sqrt{x - 1} } } ) = 1 \\ {10}^{1} = \sqrt{75 + {5}^{ \sqrt{x - 1} } } \\ 100 = 75 + {5}^{ \sqrt{x - 1} } \\ 25 = 5^{ \sqrt{x - 1} } \\ {5}^{2} = {5}^{ \sqrt{x - 1} } \\ 2 = \sqrt{x - 1} \\ 4 = x - 1 \\ x = 5$

e)

$log_{ \sqrt{x - 1} }(2x - 14) = 2 \\ ( \sqrt{x - 1} )^{2} = 2x - 14 \\ x - 1 = 2x - 14 \\ x = 13$