Question

найдите область определения функции y=log6(4x-1) и y=log19(7-2x)

Answer 1

1) 
$y=log_{6}(4x-1) \ 4x-1 textgreater 0 \ 4x textgreater 1 \ x textgreater frac{1}{4}$
D(y)=(1/4; +∞)

2)
$y=log_{ frac{1}{9} }(7-2x) \ 7-2x textgreater 0 \ -2x textgreater -7 \ x textless -7:(-2) \ x textless 3.5$
D(y)=(-∞; 3.5)