9!! + 7! =
= ( 9 × 7 × 5 × 3 × 1 ) + ( 7 × 6 × 5 × 4 × 3 × 2 × 1 )
= ( 63 × 5 × 3 × 1 ) + ( 42 × 5 × 4 × 3 × 2 × 1 )
= ( 315 × 3 × 1 ) + ( 210 × 4 × 3 × 2 × 1 )
= ( 945 × 1 ) + ( 840 × 3 × 2 × 1 )
= 945 + ( 2.520 × 2 × 1 )
= 945 + ( 5.040 × 1 )
= 945 + 5.040
= 5.985
Hi, I hope my answer helps you!
______________________
→ ( 9 × 7 × 5 × 3 × 1 ) + ( 7 × 6 × 5 × 4 × 3 × 2 × 1 )
→ ( 63 × 5 × 3 × 1 ) + ( 42 × 5 × 4 × 3 × 2 × 1 )
→ ( 315 × 3 × 1 ) + ( 210 × 4 × 3 × 2 × 1 )
→ ( 945 × 1 ) + ( 840 × 3 × 2 × 1 )
→ 945 + ( 2.520 × 2 × 1 )
→ 945 + ( 5.040 × 1 )
→ 945 + 5.040
→ 5.985
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9!! + 7! =
= ( 9 × 7 × 5 × 3 × 1 ) + ( 7 × 6 × 5 × 4 × 3 × 2 × 1 )
= ( 63 × 5 × 3 × 1 ) + ( 42 × 5 × 4 × 3 × 2 × 1 )
= ( 315 × 3 × 1 ) + ( 210 × 4 × 3 × 2 × 1 )
= ( 945 × 1 ) + ( 840 × 3 × 2 × 1 )
= 945 + ( 2.520 × 2 × 1 )
= 945 + ( 5.040 × 1 )
= 945 + 5.040
= 5.985
Hi, I hope my answer helps you!
______________________
→ ( 9 × 7 × 5 × 3 × 1 ) + ( 7 × 6 × 5 × 4 × 3 × 2 × 1 )
→ ( 63 × 5 × 3 × 1 ) + ( 42 × 5 × 4 × 3 × 2 × 1 )
→ ( 315 × 3 × 1 ) + ( 210 × 4 × 3 × 2 × 1 )
→ ( 945 × 1 ) + ( 840 × 3 × 2 × 1 )
→ 945 + ( 2.520 × 2 × 1 )
→ 945 + ( 5.040 × 1 )
→ 945 + 5.040
→ 5.985