Quis, 1). 10! - 9! + 8! = ?, 2). 90\Xb2 = ?, _______________, Kak Kenal Pernah Kenalan Sm Kenal Gak?

Quis

1). 10! - 9! + 8! = ?
2). 90² = ?

_______________
Kak Kenal pernah kenalan sm kenal gak?

 

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» Penyelesaian

= 10!

= 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1

= 90 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1

= 720 × 7 × 6 × 5 × 4 × 3 × 2 × 1

= 5.040 × 6 × 5 × 4 × 3 × 2 × 1

= 30.240 × 5 × 4 × 3 × 2 × 1

= 151.200 × 4 × 3 × 2 × 1

= 604.800 × 3 × 2 × 1

= 1.814.400 × 2 × 1

= 3.628.800 × 1

= 3.628.800

= 9!

= 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1

= 72 × 7 × 6 × 5 × 4 × 3 × 2 × 1

= 504 × 6 × 5 × 4 × 3 × 2 × 1

= 3.024 × 5 × 4 × 3 × 2 × 1

= 15.120 × 4 × 3 × 2 × 1

= 60.480 × 3 × 2 × 1

= 181.440 × 2 × 1

= 362.880 × 1

= 362.880

= 8!

= 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1

= 56 × 6 × 5 × 4 × 3 × 2 × 1

= 336 × 5 × 4 × 3 × 2 × 1

= 1.680 × 4 × 3 × 2 × 1

= 6.720 × 3 × 2 × 1

= 20.160 × 2 × 1

= 40.320 × 1

= 40.320

= 10! - 9! + 8!

= 3.628.800 - 362.880 + 40.320

= 3.265.920 + 40.320

= 3.306.240

–––––

= 90²

= 90 × 90

= 9 × 9 00

= 8.100

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