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求\(\displaystyle\int_0^b\int_0^d\sqrt{x^2+y^2}\text{d}x\text{d}y\)。\(\newcommand\d[1]{\text{d}#1}\)参考。\[\begin{aligned}&\displaystyle\int_0^b\int_0^d\sqrt{x^2+y^2}\d{x}\d{y}\\=&\int_0^b\int_{0}^{\frac{d
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<?phpheader('Content-Type:text/html;charset=utf-8');define('ROOT',$_SERVER['DOCUMENT_ROOT']);includeROOT.'/assets/php/head.php';$tit='求直角三角形各
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<?phpheader('Content-Type:text/html;charset=utf-8');define('ROOT',$_SERVER['DOCUMENT_ROOT']);includeROOT.'/assets/php/head.php';$tit='求直角三角形各
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常见的泰勒展开目录常见的泰勒展开【1】☆☆☆e的x次方【2】☆☆☆sinx【3】☆☆☆1-x分之1【4】cosx【5】1+x分之1【6】ln(1+x)【7】1+x方分之1【8】arcta
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