1、解不等式(1/2)的x²+3>2的-4x 2、求方程log的2(x²-2x-3)=1+log的2(x+1)
人气:487 ℃ 时间:2020-01-04 01:45:33
解答
你好!(1/2)^(x²+3) > 2^(-4x) = (1/2)^(4x)x² + 3 < 4xx² - 4x + 3 < 0(x - 1)(x - 3) < 01 < x < 3log2 (x² - 2x - 3) = 1 + log2 (x+1)log2 (x² - 2x - 3) = log2 (2) + log2 (x+1)log2 ...
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