tolong dongg,, jawabannya yg nomer 4

a.
log 175 = log (25 x 7)
= log 25 + log 7
= 2 . log 5 + log 7
= 2x + y

b.
log3,5 = log(5 x 7 : 10)
= log5 + log 7 - log 10
= x + y - 1

Logaritma....................