Q.

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)

8! = (56 × 6 × 5 × 4 × 3 × 2 × 1)

8! = (336 × 5 × 4 × 3 × 2 × 1)

8! = (1.680 × 4 × 3 × 2 × 1)

8! = (6.720 × 3 × 2 × 1)

8! = (20.160 × 2 × 1)

8! = 40.320

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

9! – 8! + 9! – 7! = ….

= 362.880 – 40.320 + 362.880 – 5.040

= 322.560 + 362.880 – 5.040

= 685.440 – 5.040

= 680.400

Cara Jawaban =

1..)

9! = 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 .

9! = 362.880.

8! = 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1.

8! = 40.320.

7! = 7 x 6 x 5 x 4 x 3 x 2 x1.

7! = 5.040.

9! – 8! + 9! – 7!

362.880 – 40.320 + 362.880 – 5.040.

322.560 + 357.840.

=> 680.400.