jika diketahui log 5 =x dan log 7 =y tentukan nilai log: A.log175 B.log3,5

log 5 = x
log 7 = y

•
log 175
= log (5² × 7)
= 2log 5 + log 7
= 2x + y

•
log 3,5
= log (35/10)
= log (5 × 7) - log 10
= log 5 + log 7 - log 10
= x + y - 1