meili 发表于 2022-10-27 15:23:01

设函数f(x)在点x.处可导,则limf(x.+4h)-f(x.)/h等于()备注:在lim下面是h→0选项:a:-4f'(x.)b:4f'(x.)c:-2f'(x.)d:-f'(x.)

<p>问题:设函数f(x)在点x.处可导,则limf(x.+4h)-f(x.)/h等于()备注:在lim下面是h→0选项:a:-4f'(x.)b:4f'(x.)c:-2f'(x.)d:-f'(x.)
<p>答案:↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">陈文青的回答:<div class="content-b">网友采纳  b  limf(x.+4h)-f(x.)/hh→0  =lim4(f(x.+4h)-f(x.))/4h4h→0  =4lim(f(x.+4h)-f(x.))/4h4h→0  =4f'(x.)
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