Quiz 4! × 7!! = 6!! × 2! = ​

4! × 7!!

= (4.3.2.1) × (7.5.3.1)

= (12.2.1) × (35.3.1)

= (24.1) × (105.1)

= 24 × 105

= 2.520

6!! × 2!

= (6.4.2) × (2.1)

= (24.2) × 2

= 48 × 2

= 96

4! × 7!!

( 4 × 3 × 2 × 1 ) × ( 7 × 5 × 3 × 1 )

( 12 × 2 × 1 ) × ( 35 × 3 × 1 )

( 24 × 1 ) × ( 105 × 1 )

24 × 105

= 2.520 ✅

6!! × 2!

( 6 × 4 × 2 ) × ( 2 × 1 )

( 24 × 2 ) × 2

48 × 2

= 96 ✅

~Opung~