SOLUTION: Find the sum of the infinite series {{{ 1 + 2 + 3 + 4 + ... + r -1 }}} divided by r! (factorial of r) where r belongs to infinite set {2, 3, 4, 5, .....}.

Question 1184295: Find the sum of the infinite series divided by r! (factorial of r) where r belongs to infinite set {2, 3, 4, 5, .....}.
Found 2 solutions by ikleyn, robertb:
Answer by ikleyn(52906)   (Show Source): You can put this solution on YOUR website!
.

    M A K E S   no   S E N S E

Please avoid posting nonsense to this forum.

Answer by robertb(5830)   (Show Source): You can put this solution on YOUR website!
If what you meant was

then the answer is , for .
In this website you will only get a precise answer if
you posted a precise question.
So as a piece of advice, next time, if you want tutors here
to help you, try to be more accurate in your statement of
the problem.
RELATED QUESTIONS
Find the sum of the infinite series (1 + 2 + 3 + 4 + .... + r-1) divided by r! where r is (answered by ikleyn)
find the sum of infinite geometric series: a1=26,... (answered by benazir.sj@gmail.com)
What is the value of the infinite series governed by {{{a[1] = 2/3}}} and {{{r =... (answered by Edwin McCravy)
find the sum of the infinite geometric series a1=27 and r=... (answered by jim_thompson5910)
I really need some help describing and correcting the error. r^2-7r+12/ r+4 divided by (answered by stanbon,TeachMath)
What is the sum of the infinite geometric series with a1 = 27 and r =... (answered by longjonsilver)
Find the sum of an infinite geometric series where a1 = 180, and the common ratio is r = (answered by math_tutor2020,ikleyn)
Find the sum of each infinite geometric series 35. 4 -2 + 1 -1/2+... common ratio = (answered by mathsteacher)
Find some value R, {{{R!/((R-3)!(R-4)!)=1}}}. Find the sum of the digits of R. R! over (answered by math_helper,Edwin McCravy)