diketahui log 2 = a, log 3 = b, log 5 = c, maka nilai log 2.250 = ?

log 2.250 = log(15².10)
                = log 15² + log 10
                = 2 log 15 + log 10
                = 2 (log(3.5)) + log(2.5)
                = 2 (log 3 + log 5) + (log 2 + log 5)
                = 2(b + c) + (a + c)
                = 2b + 2c + a + c
                = a + 2b + 3c