Form 4 MATHS.............help!

👨🏻‍🏫 學術台數學

Joe Dole

2010-08-02 8:11 pm

(1/5)ln32+(1/4)ln25-ln開方2

更新1:

How to change to = (1/2)In2 + (1/2)In 5 ?

更新2:

understand la,thank you

回答 (1)

用戶2053

2010-08-02 8:22 pm

✔ 最佳答案

(1/5)ln32 + (1/4)ln25 - ln√ 2= (1/5)In(2^5) + (1/4)In(5^2) - In 2^(1/2)= In2 + (2/4)In5 - (1/2)In 2= (1/2)In2 + (1/2)In 5 = (1/2) (In2 + In5)= (1/2) (In 10)

2010-08-02 12:27:34 補充：
In2 - (1/2)In2 = (1/2)In2

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