Q.
12!!
13!!
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12!!
13!!
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- 12!!
- 12 × 10 × 8 × 6 × 4 × 2
- 120 × 48 × 8
- 120 × 384
- 46.080
- 13!!
- 13 × 11 × 9 × 7!!
- 143 × 9 × 105
- 1.287 × 105
- 135.135
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• 12!!
= 12 × 10 × 8 × 6 × 4 × 2
= 120 × 48 × 8
= 5.760 × 8
= 46.080
• 13!!
= 13 × 11 × 9 × 7 × 5 × 3 × 1
= 143 × 63 × 15
= 9.009 × 15
= 135.135
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