1️⃣ Rumus Faktorial

Rumus:

<span class="katex-display"><span class="katex"><span class="katex-mathml">n!=n×(n−1)×(n−2)×⋯×1n! = n \times (n-1) \times (n-2) \times \dots \times 1</span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut"></span><span class="mord mathnormal">n</span><span class="mclose">!</span><span class="mspace"></span><span class="mrel">=</span><span class="mspace"></span></span><span class="base"><span class="strut"></span><span class="mord mathnormal">n</span><span class="mspace"></span><span class="mbin">×</span><span class="mspace"></span></span><span class="base"><span class="strut"></span><span class="mopen">(</span><span class="mord mathnormal">n</span><span class="mspace"></span><span class="mbin">−</span><span class="mspace"></span></span><span class="base"><span class="strut"></span><span class="mord">1</span><span class="mclose">)</span><span class="mspace"></span><span class="mbin">×</span><span class="mspace"></span></span><span class="base"><span class="strut"></span><span class="mopen">(</span><span class="mord mathnormal">n</span><span class="mspace"></span><span class="mbin">−</span><span class="mspace"></span></span><span class="base"><span class="strut"></span><span class="mord">2</span><span class="mclose">)</span><span class="mspace"></span><span class="mbin">×</span><span class="mspace"></span></span><span class="base"><span class="strut"></span><span class="minner">⋯</span><span class="mspace"></span><span class="mbin">×</span><span class="mspace"></span></span><span class="base"><span class="strut"></span><span class="mord">1</span></span></span></span></span>

Digunakan dalam bisnis untuk:

• Perhitungan kombinasi dan peluang
  Contoh:

  • Menentukan jumlah kemungkinan susunan produk

  • Analisis strategi penjadwalan

  • Perhitungan probabilitas risiko

📌 Contoh bisnis:
Menentukan berapa banyak cara menyusun 5 produk berbeda di etalase toko.

2️⃣ Rumus Pembalikan String

(Bukan rumus matematika, tapi logika pemrograman)

Digunakan dalam bisnis untuk:

• Pengolahan data & sistem

  • Validasi kode produk

  • Enkripsi sederhana

  • Manipulasi data pelanggan

  • Sistem barcode atau SKU

📌 Contoh bisnis:
Membalik kode transaksi untuk kebutuhan keamanan internal atau debugging sistem.

3️⃣ Rumus Konversi Suhu Celsius ke Fahrenheit

Rumus:

<span class="katex-display"><span class="katex"><span class="katex-mathml">F=(C×95)+32F = (C \times \frac{9}{5}) + 32</span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut"></span><span class="mord mathnormal">F</span><span class="mspace"></span><span class="mrel">=</span><span class="mspace"></span></span><span class="base"><span class="strut"></span><span class="mopen">(</span><span class="mord mathnormal">C</span><span class="mspace"></span><span class="mbin">×</span><span class="mspace"></span></span><span class="base"><span class="strut"></span><span class="mord"><span class="mopen nulldelimiter"></span><span class="mfrac"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist"><span class="pstrut"></span><span class="mord"><span class="mord">5</span></span><span class="pstrut"></span><span class="frac-line"></span><span class="pstrut"></span><span class="mord"><span class="mord">9</span></span></span><span class="vlist-s"></span></span><span class="vlist-r"><span class="vlist"></span></span></span></span><span class="mclose nulldelimiter"></span></span><span class="mclose">)</span><span class="mspace"></span><span class="mbin">+</span><span class="mspace"></span></span><span class="base"><span class="strut"></span><span class="mord">32</span></span></span></span></span>

Digunakan dalam bisnis untuk:

• Industri makanan & minuman

• Logistik cold storage

• Manufaktur

• Ekspor–impor internasional

• Perhotelan & pariwisata

📌 Contoh bisnis:
Perusahaan logistik ekspor harus mengonversi suhu penyimpanan dari standar Indonesia (°C) ke standar Amerika (°F).

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