Докажите log5 6+ log4 5 >-1

Question

Докажите log5 6+ log4 5 >-1

Answer 1

Log5 (6) > log5 (5) =1
log4 (5) > log4 (4) = 1

log5(6) + log4(4) > 1 + 1 = 2 > -1