用两函数之商的求导法则求y=x+3/x^2+3的导数
<p>问题：用两函数之商的求导法则求y=x+3/x^2+3的导数<p>答案：↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">林慧苹的回答：<div class="content-b">网友采纳 y=(x+3)/(x^2+3) y'=[(x+3)'(x^2+3)-(x+3)(x^2+3)']/(x^2+3)^2 =[(x^2+3)-2x(x+3)]/(x^2+3)^2 =/(x^2+3)^2 =(-x^2-6x+3)/(x^2+3)
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