QUIZ #3091. 2! + 3! - 2! + 3! = ...2. 2! - 3! + 2! - 3! = ...3. 2! + 3! - 2!

MasaDepanmuNantiMas

1. 2! + 3! - 2! + 3!

= (2 × 1) + (3 × 2 × 1) - (2 × 1) + (3 × 2 × 1)

= 2 + 6 - 2 + 6

= 12

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2. 2! - 3! + 2! - 3!

= (2 × 1) - (3 × 2 × 1) + (2 × 1) - (3 × 2 × 1)

= 2 - 6 + 2 - 6

= -8

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3. 2! + 3! - 2! - 3!

= (2 × 1) + (3 × 2 × 1) - (2 × 1) - (3 × 2 × 1)

= 2 + 6 - 2 - 6

= 0

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ItsMeZio

2! + 3! - 2! + 3!

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

= 2 + ( 6 x 1 ) - 2 + ( 6 x 1 )

= 2 + 6 - 2 + 6

= 8 - 2 + 6

= 6 + 6

= 12

2! - 3! + 2! - 3!

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

= 2 - ( 6 x 1 ) + 2 - ( 6 x 1 )

= 2 - 6 + 2 - 6

= ( - 4 ) + 2 - 6

= ( - 2 ) - 6

= - 8

2! + 3! - 2! - 3!

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

= 2 + ( 6 x 1 ) - 2 - ( 6 x 1 )

= 2 + 6 - 2 - 6

= 8 - 2 - 6

= 6 - 6

= 0

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