-2
$\begingroup$

100!-99! I am having a bit of difficulty with this question. Thanks in advance

$\endgroup$

closed as off-topic by TomGrubb, mfl, Saad, Santana Afton, Lee David Chung Lin Mar 27 at 2:33

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question is missing context or other details: Please provide additional context, which ideally explains why the question is relevant to you and our community. Some forms of context include: background and motivation, relevant definitions, source, possible strategies, your current progress, why the question is interesting or important, etc." – TomGrubb, mfl, Saad, Santana Afton, Lee David Chung Lin
If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ Hint: try writing the expansions of both terms $\endgroup$ – Alex Mar 27 at 0:35
  • 1
    $\begingroup$ Welcome to MSE. Hint: $100!=100\times99!$ $\endgroup$ – J. W. Tanner Mar 27 at 0:36
1
$\begingroup$

You have $$ 100! - 99! = 100\times 99! - 99! = (100-1)99! $$

$\endgroup$
  • 1
    $\begingroup$ $=99 \times 99!$ $\endgroup$ – J. W. Tanner Mar 27 at 0:45

Not the answer you're looking for? Browse other questions tagged or ask your own question.