DSE Maths-Core V: Exponential & Logarithm 指數&對數

題目: 1 + log5 = log(x+3)

其實呢d好簡單..目標係整走個log,只要將兩邊變做log xxxxx 就可以一齊整走佢
log10 + log5 = log(x+3)
log50 = log(x+3)
50 = x+3
x = 47

既然咁容易..講黎做咩呢?
因為好多人都唔記得左log最基本個幾條公式..
log A + log B = log ( AB )
log A - log B = log ( A/B )
B log A = log ( A^B )
拜託唔熟都要記到熟..呢d係執分題黎..唔好簡單到唔記得點做~_~
兩個log相加 -> 一個log相乘..記住喇..  唔好搞錯log(A+B)呀..呢個冇得變架..