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វប្បធម៏ទូទៅ

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សំនួរ

  • គេមាន$y=f(x)=\frac{x^3+4x-5}{x+1}=x^2-x+5-\frac{10}{x+1}$
តើ$y=x^2-x+5$ ជាអាស៊ីមតូតទ្រេតរឺទេ?
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សៀវភៅពិជគណិត ភាសាអង់គ្លេស

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លំហាត់

  • ចូរគណនាលីមីតខាងក្រោម៖
  1. $\lim_{x\to\infty}(1+\frac1x)^{3x}$
  2. $lim_{x\to\infty}(1+\frac{1}{x^2})^{3x-4}$
  3. $lim_{x\to\infty}(\frac{7x+10}{1+7x})^{\frac x3}$
  4.       $\lim_{x\to 0}x^{x}$
  5.  $\lim_{x\to 1}\frac{\sqrt[n]{x}-1}{\sqrt[m]{x}-1}$
  6. $\lim_{x\to a}\frac{\sqrt{x-b}-\sqrt{a-b}}{x^2-a^2}$    
  7.      $\lim_{x\to 1}\frac{x^2-x\sin x}{x-\sin^2x}$
  8. $\lim_{x\to +\infty}\left(\frac{x+1}{ln x}\right)$
  9.  $\lim_{x\to +\infty}\frac{lnx+2x^2-2x+1}{x}$
  10. $\lim_{x\to 0^+}ln(\cos x)lnx$ 
  11. $\lim_{x\to +\infty}\frac{e^xlnx+1}{x^2}$
  12.  $\lim_{x\to 0}\frac{\sin x+e^x-1}{x^2+x}$

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លំហាត់

  1. ដោយប្រើ​ Leinitz's rule ចូររកដេរីទី n-th នៃអនុគមន៏ខាងក្រោម៖ 
  • $y=x.e^x$
  • $y=\frac{1+x}{\sqrt{x}}$
  • $y=x^2.e^{-2x}$
  • $y=(1-x^3)\cos x$
  • $y=x^3.\ln x$
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លំហាត់

ចូរគណនាដេរីវេទី​n-th
  1. $y=x^3\sin x$
  2. $y=\sin x$
  3. $y=\cos x$
  4. $y=\frac{1}{x-2}$
  5. $y=\sqrt{x}$
  6. $y=\cos 2x$
  7. $y=\frac{1+x}{1-x}$
  8. $y=\sin^2x$
  9. $y=e^{-3x}$
  10. $y=\ln(x+1)$                          by chanchav
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សៀវភៅគណិតវិទ្យាថ្នាក់ទី១០ភាគ១

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គណិតវិទ្យាថ្នាក់ទី១០ភាគ២

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គណិតវិទ្យាថ្នាក់ទី១១កំរិតខ្ពស់

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គណិតវិទ្យាទី១១កំរិតមូលដ្ឋាន

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គណិតវិទ្យាថ្នាក់ទី១២កំរិតខ្ពស់

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លំហាត់គណិតវិទ្យា

សមីការលីនេអ៊ែ
  1. សមីការលីនេអ៊ែរលំដាប់មួយមានរាង៖$a(x)y'+b(x)y=f(x)$ដើម្បីដោះស្រាយសមីការលីនេអ៊ែរលំដាប់មួយគេត្រូវប្រើវីធីម្យាង
    ឈ្មោះថាកត្តាអាំតេក្រាល
  2.  គេត្រូវសរសេរសមីការនេះឲ្យទៅជារាង$y'+p(x)y=g(x)$ដែល$p(x)=\frac{b(x)}{a(x)}$និង$g(x)=\frac{f(x)}{a(x)}$។  គុណសមីការដោយកត្តាអាំងតេក្រាលគឺ$e^{\int p(x)dx}$គេបាន    $e^{\int p(x)dx}y'+e^{\int p(x)dx}p(x)y=g(x)e^{\int p(x)dx}\iff (ye^{\int p(x)dx})'=g(x)e^{\int p(x)dx}$
    1.             $\int (ye^{\int p(x)dx})'dx=\int g(x)e^{\int p(x)dx}dx+c\iff y= e^{-\int p(x)}\int g(x)e^{\int p(x)dx}+ e^{-\int p(x)dx}c$
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លំហាត់

 I.គេឲ្យអនុគមន៏​ $f(x)=\sqrt{x+2}$។
        1.បង្ហាញថាចំពោះ $x\in[-1,2]$ គេបាន
        $\frac14 x+\frac54\le\sqrt{x+2}\le \frac12 x+\frac32$
        2.បកស្រាយលទ្ធផលខាងលើតាមក្រាភិច។
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លំហាត់ប្រូបាប

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