Question

Q. ( +50 )

No 1 :
• 9 × 9² + 3! - 9 = . . .

No 2 :
• 8!! + 4! = . . .





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Answer 1

PENYELESAIAN

Bagian 1

9 × 9² + 3! - 9

9 × (9 × 9) + (3 × 2 × 1) - 9

9 × 81 + (6 × 1) - 9

9 × 81 + 6 - 9

729 + 6 - 9

735 - 9

726

Bagian 2

8!! + 4!

(8 × 6 × 4 × 2) + (4 × 3 × 2 × 1)

(48 × 8) + (12 × 2)

384 + 24

408

Answer 2

» pembahasan «

→ soal ¹ :

9 x 9² + 3! - 9

= 9 x ( 9 x 9 ) + ( 3 x 2 x 1 ) - 9

= 9 x 81 + 6 - 9

= 729 - 9 + 6 → ( komutatif )

= 720 + 6

= 726

→ soal² :

= 8!! + 4!

= ( 8 x 6 x 4 x 2 ) + ( 4 x 3 x 2 x 1 )

= 384 + 24

= 408