(1 - log4 36 ) = (log4 4 - log4 36) = log4 (4/36) = log4 (1/9)
(1 - log9 36 ) = (log9 9 - log9 36) = log9 (9/36) = log9 (1/4)
log4 (1/9) = ( log9 (1/9) )/( log9 4 ) = (-1)/( log9 4 )
log9 (1/4) = ( log4 (1/4) )/( log4 9 ) = (-1)/( log4 9 )
(-1)/( log9 4 ) * (-1)/( log4 9 ) =1/( log9 4 ) * ( log9 4 ) = 1
С)