Question

evaluate 7! - 5! . class 11th

Answer 1

7! - 5! 
= (1 x 2 x 3 x 4 x 5 x 6 x 7) - (1 x 2 x 3 x 4 x 5) 
= (1 x 2 x 3 x 4 x 5)(6 x 7 - 1) 
= (2 x 3 x 4 x 5)(42 - 1) 
= (6 x 4 x 5)(41) 
= 24 x 5 x 41 
= 4920

Answer 2

The value of the expression is $7!-5!=4920$.

Step-by-step explanation:

Given : Expression $7!-5!$

To find : Evaluate the expression ?

Solution :

Write the expression as,

$7!-5!=7\times 6\times 5!-5!$

$7!-5!=5!(7\times 6-1)$

$7!-5!=5!(42-1)$

$7!-5!=5!\times 41$

$7!-5!=5\times 4\times 3\times 2\times 1\times 41$

$7!-5!=4920$

Therefore, the value of the expression is $7!-5!=4920$.

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