About Lesson
17.2 Logarithm 对数
1. Simplify 化简
(a)
(b) – +
(c) log25 + log2log50 + (log2)
Answer:
(a)
(b) 0
(c) 2
2.
If a + b = 14ab, prove that =
若a2 + b2 = 14ab, 试证 =
3.
Given that 2 = 9 = 125 = 120, prove that + + =1
已知2 = 9 = 125 = 120, 试证 + + =1
4.
Given that a, b, c are positive and 3 = 4 = 6 , prove that = + .
已知 a, b, c 是正值且 3 = 4 = 6 , 试证 = + .