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[ Math ]
討論串[中學] 指對數
共 32 篇文章
內容預覽:
(log(x^(1/4)*(1+x^(1/4))))/log(12)=log(x^(1/2))/log(9). Let y=x^(1/4). Then x^(1/2)=y^2. (log(y)+log(1+y))/(log(12))=(2*log(y))/(2*log(3)). log(12)*lo
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內容預覽:
試試看：. a = 2^x >0. b = 3^y >0. c = 5^z >0. ┌a + b + c = 7 => c < 7. └a/2 + b + 5c = 11 => c < 11/5. ＝> b + 9c = 15 => b = 15 - 9c >0 => c < 5/3. a + (1
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