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		<title>Metode Numerik : Metode Newton-Raphson</title>
		<link>https://ramzilhuda.com/metode-numerik-metode-newton-raphson/</link>
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		<dc:creator><![CDATA[ramzilhuda]]></dc:creator>
		<pubDate>Thu, 05 Nov 2020 00:26:03 +0000</pubDate>
				<category><![CDATA[Metode Numerik]]></category>
		<category><![CDATA[konvergensi]]></category>
		<category><![CDATA[metode]]></category>
		<category><![CDATA[Metode Newton-Raphson]]></category>
		<category><![CDATA[metode numerik]]></category>
		<category><![CDATA[persamaan]]></category>
		<guid isPermaLink="false">https://ramzilhuda.com/?p=337</guid>

					<description><![CDATA[Prosedur Lelaran Jika terjadi f’(x) = 0, ulang kembali perhitungan dengan nilai x0 yang lain. Jika persamaan f(x) = 0 memiliki lebih dari satu akar, pemilihan x0 yang berbeda-beda dapat menenmukan akar yang lain. Dapat pula terjadi lelaran konvergen ke akar yang berbeda dari yang diharapkan. Baca juga artikel tentang Tautologi, Kontradiksi dan Kesetaraan Logis [&#8230;]]]></description>
										<content:encoded><![CDATA[<h1><b>Prosedur Lelaran</b></h1>
<p><img data-recalc-dims="1" fetchpriority="high" decoding="async" class="aligncenter size-full wp-image-338" src="https://i0.wp.com/ramzilhuda.com/wp-content/uploads/2020/11/Metode-Newton-Rapshon-1.jpg?resize=604%2C224&#038;ssl=1" alt="" width="604" height="224" srcset="https://i0.wp.com/ramzilhuda.com/wp-content/uploads/2020/11/Metode-Newton-Rapshon-1.jpg?w=604&amp;ssl=1 604w, https://i0.wp.com/ramzilhuda.com/wp-content/uploads/2020/11/Metode-Newton-Rapshon-1.jpg?resize=300%2C111&amp;ssl=1 300w" sizes="(max-width: 604px) 100vw, 604px" /></p>
<p>Jika terjadi <i>f’(x) </i>= 0, ulang kembali perhitungan dengan nilai <i>x</i><i>0</i> yang lain. Jika persamaan <i>f(x)</i> = 0 memiliki lebih dari satu akar, pemilihan <i>x</i><i>0</i> yang berbeda-beda dapat menenmukan akar yang lain. Dapat pula terjadi lelaran konvergen ke akar yang berbeda dari yang diharapkan.</p>
<p>Baca juga artikel tentang <strong><a href="https://ramzilhuda.com/tautologi-kontradiksi-dan-kesetaraan-logis-matematika-diskrit/">Tautologi, Kontradiksi dan Kesetaraan Logis</a></strong></p>
<h2><b>Algoritma Metode Newton Raphson </b></h2>
<ol>
<li>Definisikan fungsi f(x) dan f’(x)</li>
<li>Tentukan toleransi error (∈) dan <a href="https://ramzilhuda.com/metode-numerik-analisis-galat/">iterasi</a> maksimum (n)</li>
<li>Tentukan nilai pendekatan awal x0</li>
<li>Hitung f(x0) dan f’(x0)</li>
<li>Untuk iterasi i = 1 s/d n atau |f(xi)| ³ e</li>
</ol>
<p><img data-recalc-dims="1" decoding="async" class="aligncenter size-full wp-image-339" src="https://i0.wp.com/ramzilhuda.com/wp-content/uploads/2020/11/Metode-Newton-Rapshon-2.jpg?resize=225%2C74&#038;ssl=1" alt="" width="225" height="74" /></p>
<p>Hitung f(xi) dan f’(xi)</p>
<p>6. Akar persamaan adalah nilai xi yang terakhir diperoleh.</p>
<p>Contoh 2 :</p>
<p>Hitunglah akar <i>f(x) </i>= <i>e</i><i>x</i> – 5<i>x</i><i>2  </i><i> </i>dengan metode <a href="https://ramzilhuda.com/metode-numerik-integrasi-numerik/">Newton</a> Raphson dengan tebakan awal <i>x</i><i>0</i> = 0.5 dan gunakan ε = 0.00001</p>
<p>Penyelesaian :</p>
<p><img data-recalc-dims="1" decoding="async" class="aligncenter size-full wp-image-340" src="https://i0.wp.com/ramzilhuda.com/wp-content/uploads/2020/11/Metode-Newton-Rapshon-3.jpg?resize=608%2C330&#038;ssl=1" alt="" width="608" height="330" srcset="https://i0.wp.com/ramzilhuda.com/wp-content/uploads/2020/11/Metode-Newton-Rapshon-3.jpg?w=608&amp;ssl=1 608w, https://i0.wp.com/ramzilhuda.com/wp-content/uploads/2020/11/Metode-Newton-Rapshon-3.jpg?resize=300%2C163&amp;ssl=1 300w" sizes="(max-width: 608px) 100vw, 608px" /></p>
<p>Contoh 3 :</p>
<p>Tentukan bagaimana cara menentukan nilai √c</p>
<p>dengan metode Newton Raphson</p>
<p>Penyelesaian :</p>
<p>Misalkan √<i>c </i>= <i>x</i> -&gt; kuadratkan kedua ruas -&gt; <i>c</i> = <i>x</i><i>2 </i><i> -&gt;</i> <i>x</i><i>2</i><i> – c </i>= 0 -&gt; <i>f(x)</i></p>
<p><img data-recalc-dims="1" loading="lazy" decoding="async" class="aligncenter size-full wp-image-341" src="https://i0.wp.com/ramzilhuda.com/wp-content/uploads/2020/11/Metode-Newton-Rapshon-4.jpg?resize=606%2C340&#038;ssl=1" alt="" width="606" height="340" srcset="https://i0.wp.com/ramzilhuda.com/wp-content/uploads/2020/11/Metode-Newton-Rapshon-4.jpg?w=606&amp;ssl=1 606w, https://i0.wp.com/ramzilhuda.com/wp-content/uploads/2020/11/Metode-Newton-Rapshon-4.jpg?resize=300%2C168&amp;ssl=1 300w" sizes="auto, (max-width: 606px) 100vw, 606px" /></p>
<h2><b>Kriteria konvergensi metode Newton-Raphson</b></h2>
<p>Jika metode <a href="https://ramzilhuda.com/metode-numerik-solusi-persamaan-nirlanjar-ii/">Newton-Raphson</a> konvergen, maka kekonvergenannya akan berlangsung cepat -&gt; lelarannya lebih sedikit . Pemilihan tebakan awal akar sebaiknya cukup dekat dengan akar sejatinya dengan membuat grafik fungsi dapat diketahui apakah fungsi tersebut mempunyai akar atau tidak.</p>
<p>Metode Newton-Raphson akan konvergen bila :</p>
<p><img data-recalc-dims="1" loading="lazy" decoding="async" class="aligncenter size-full wp-image-342" src="https://i0.wp.com/ramzilhuda.com/wp-content/uploads/2020/11/Metode-Newton-Rapshon-5.jpg?resize=429%2C115&#038;ssl=1" alt="" width="429" height="115" srcset="https://i0.wp.com/ramzilhuda.com/wp-content/uploads/2020/11/Metode-Newton-Rapshon-5.jpg?w=429&amp;ssl=1 429w, https://i0.wp.com/ramzilhuda.com/wp-content/uploads/2020/11/Metode-Newton-Rapshon-5.jpg?resize=300%2C80&amp;ssl=1 300w" sizes="auto, (max-width: 429px) 100vw, 429px" /></p>
<p>teman &#8211; teman dapat juga menonton video tentang <a href="https://www.youtube.com/watch?v=z1Ek51PAuJw"><strong>Contoh Soal Metode Lelaran Titik Tetap</strong></a></p>
<p>&nbsp;</p>
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