推 pigheadthree:奇怪，小弟計算出來的答案應該是1/2才對？ 02/14 15:03
※ 引述《pigheadthree (爬山)》之銘言：
: 題目：log_16 {[21+6*(6)^(1/2)]^(1/2)-[5-(24)^(1/2)]^(1/2)}
: 答案：5/8
_______ ______ ________ ______
log √21+6√6 - √5-√24 = log √21+2√54 - √5-2√6
16 16 5
---
__ 2 5
log √18 + √3 - (√3 - √2 ) = log 4√2 = log 2 = ---
16 16 4 8
2
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