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Question on writing summations in expanded form 
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#1
Sep2506, 09:33 PM

P: 1,629

Hello everyone.
I have the following: THe sumnation of 1/k! from k = 0, to n. I"m suppose to write this in expanded form. I did the following: 1/0! + 1/1! + 1/2! + 1/3! +....+1/n! = 1 + 1 + 1/2 + 1/6 + 1/24 + 1/120 +...+ 1/n! Is that what they wanted? An example simliar to this one was the following: Sumnation (2)^i from i = 1 to n. (2)^1 + (2)^2 + (2)^3 + ... + (2)^n = 2 + 2^2 2^3 +...+(1)^n(2)^n from mine the signs don't seem to be changing, so is it just simply 1/n! Also i was wondering if someone could check to see if i did this one correctly: Write each using summnation or product notation. 41. n + (n1)/2! + (n2)/3! + (n3)/4! + .. + 1/n! I said: Sumnation from k = 1 to n, (nk)/n! Thanks! 


#2
Sep2606, 04:34 AM

Math
Emeritus
Sci Advisor
Thanks
PF Gold
P: 39,353




#3
Sep2606, 11:57 AM

P: 1,629

Thanks for the help!



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