oblicz; a) log₂√2+log₃9-log½4 b) log₃27-log½√2+log₃⅓ c) log125+log4-log5 d) log₃36-log₃2+log₃⅙ e) log₇19-log₇ ¹⁹/₄₉

a) log₂√2+log₃9-log½4 =1/2+2-(-2)=4,5 b) log₃27-log½√2+log₃⅓=3-(-1/2)+(-1)=2,5 c) log125+log4-log5=log125*4:5=log100=10 d) log₃36-log₃2+log₃⅙=log₃36:2*1/6=log₃3=1 e) log₇19-log₇ ¹⁹/₄₉=log₇19:19/49=log₇49=2