For any positive integer n, (n + 1)!/n! - n = ?

[hdonley]

I am needing help to learn the process on how to answer this question. I learn best from seeing it worked out.

For any positive intrger n, (n+1)!/n!-n=
A - 0
B - 1
C - n
D - n+1
E - n!

Answer is B - 1. How do you get the answer? What does "!" stand for?

Thank you!

 

[Deleted member 4993]

I am needing help to learn the process on how to answer this question. I learn best from seeing it worked out.

For any positive intrger n, (n+1)!/n!-n=
A - 0
B - 1
C - n
D - n+1
E - n!

Answer is B - 1. How do you get the answer? What does "!" stand for?

Thank you!

That is factorial.

Do you know what that is?

 

[Steven G]

I am needing help to learn the process on how to answer this question. I learn best from seeing it worked out.

For any positive intrger n, (n+1)!/n!-n=
A - 0
B - 1
C - n
D - n+1
E - n!

Answer is B - 1. How do you get the answer? What does "!" stand for?

Thank you!

n! = 1*2*3*...*n = n*(n-1)*...*3*2*1.
So 5! = 5*4*3*2*1=120.
Got it??

 

[mmm4444bot]

… I learn best from seeing it worked out.

Hello hdonley! We don't generally provide such service.

Please read the forum guidelines; you may begin with this summary. Thank you.

What does "!" stand for?

This indicates that you're not yet ready for this exercise. You first need experience with some introductory factorial exercises.

If you need help finding lesson materials for beginners, try googling keywords like algebra introduction factorials, to find sites like this one.

Once you've practiced to the point where you can try something on your posted exercise, please show us your efforts or explain why you're stuck. Of course, if you see anything in a lesson you don't understand, let us know. :cool: