Q. • • 7! + 5! - 6! "Gunakan cara pengerjaan".... Question from @ApprenticeKids

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7! + 5! - 6!

$(7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1) + (5 \times 4 \times 3 \times 2 \times 1) - (6 \times 5 \times 4 \times 3 \times 2 \times 1) \\ (42 \times 5 \times 4 \times 3 \times 2 \times 1) + (20 \times 3 \times 2 \times 1) - (30 \times 4 \times 3 \times 2 \times 1) \\ (210 \times 4 \times 3 \times 2 \times 1) + (60 \times 2 \times 1) - (120 \times 3 \times 2 \times 1) \\ (840 \times 3 \times 2 \times 1) + (120 \times 1) - (360 \times 2 \times 1) \\ (2.520 \times 2 \times 1) + 120 - (720 \times 1) \\(5.040 \times 1) + 120 - 720 \\ 5.040 + 120 - 720 \\ 4.440$

$\purple{\boxed{\boxed{\pink{»Answer by:シ⎝⎝PutririYandAni⎠⎠シ}}}}$

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Faktorial merupakan merupakan penghitungan perkalian yang banyaknya susunan. Faktorial disebut dengan n!,

Penyelesaian

7! + 5! + 6!

= 7!

= 7 × 6 × 5 × 4 × 3 × 2 × 1

= 42 × 5 × 4 × 3 × 2 × 1

= 210 × 4 × 3 × 2 × 1

= 840 × 3 × 2 × 1

= 2.520 × 2 × 1

= 5.040 × 1

= 5.040

========================

= 5!

= 5 × 4 × 3 × 2 × 1

= 20 × 3 × 2 × 1

= 60 × 2 × 1

= 120 × 1

= 120

========================

= 6!

= 6 × 5 × 4 × 3 × 2 × 1

= 30 × 4 × 3 × 2 × 1

= 120 × 3 × 2 × 1

= 360 × 2 × 1

= 720 × 1

= 720

========================

= 5.040 + 120 - 720

= 5.160 - 720

= 4.440

${ \rm{\colorbox{black}{\colorbox{hotpink}{C}\colorbox{lavender}{a}\colorbox{violet}{ll}\colorbox{aqua}{M}\colorbox{skyblue}{e}\colorbox{hotpink}{C}\colorbox{lavender}{h}\colorbox{pink}{a}{\colorbox{yellow}{n}\colorbox{skyblue} {\color{hotpink}{✘}}}}}}$

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