Posted by kiksy on Thursday, March 17, 2011 at 12:13am.
hi
i startted the problem below by writing a sigma notation
of
sigma[(2^(n+1))/((n+1)!)]
QUESTION:
how do i find the sum of 2+(4/2!)+(8/3!)+(16/4!)+...
was my attempt wrong, or how do i go from here? thank you!

math  MathMate, Thursday, March 17, 2011 at 11:56am
Express the individual elements of each term in terms of i.
For the 3rd term, i=3, then
8/3!=2*³/3! = 2³/i!
Verify with another term:
for i=4,
2^i/i!=16/4! = 4th term, OK
Check the first term (which does not have the same form), i=1
2^1/1! = 2/1 = 2 OK
So the sum would be:
Σ2^i /i! for i=1 to ∞
Answer This Question
Related Questions
 math  hi i startted the problem below by writing a sigma notation of sigma[(2^(...
 Algebra  find the indicated sum not sure how to type the sigma sign, but here ...
 math  I just need help with this. Write the series in sigma notation. 1/4 + 1/2...
 math  I just need help with this. Write the series in sigma notation. 1/4 + 1/2...
 Maths  Express the sum using summation notation: 1  1/2 + 1/3  1/4 + 1/5...
 Maths  Express the sum using summation notation: 1  1/2 + 1/3  1/4 + 1/5...
 Maths  Express the sum using summation notation: 1  1/2 + 1/3  1/4 + 1/5...
 sigma notation  find the value of the sum n sigma i=1 (25i)
 PreCalcPlease check  Please check: 1.Write in expanded form: this is a sigma ...
 Physics  If I wanted to right SIGMA F = ma in the proper notation what would I ...
More Related Questions