Log(0,4)5-log(0,4)2 помогите))

Question

Log(0,4)5-log(0,4)2
помогите))

Answer 1

Loga b/c=loga b - loga c
log(0,4)5-log(0,4)2 = log 2/5 5/2=log 2/5 (2/5)^-1=-1 log2/5 2/5=-1

Answer 2

Log(0,4)5-log(0,4)2 = log(0,4) 5/2 =  log(2/5) (2/5)^-1 =  -1 *log(2/5) (2/5) = -1*1 = -1