  Math Central - mathcentral.uregina.ca  Quandaries & Queries    Q & Q    Topic: summation   start over

7 items are filed under this topic.    Page1/1            1+2+4+8....= -1 2012-04-02 From Andy:In this minutephysics video, it's claimed that 1+2+4+8....= -1 Is this true, and if so, how? < href="http://www.youtube.com/watch?v=kIq5CZlg8Rg">http://www.youtube.com/watch?v=kIq5CZlg8RgAnswered by Robert Dawson.     1/1+1/2+1/3... 2010-03-31 From Mohd:you explained the way of getting the summation of 100 series numbers but what is the summation of the numbers 1/1+1/2+1/3+1/4+1/5.............................+1/100Answered by Robert Dawson.     Summation Notation 2009-12-28 From MANDIRA:I want to get the formula for expressing one number by summation of consucutive numbers .Answered by Janice Cotcher.     Total payments for a loan 2007-10-11 From Robin:A person is going to arrange a loan at 3 mill. he will pay 150000 back each year , so it take 20 yrs. to finish. In addition he pays 5% interest of what is leaft each year. How do I find the sum-function which shows the total sum he have payed?Answered by Stephen La Rocque.     The odd numbers from 30 to 80 2006-09-21 From Kieran:If you added all the odd numbers from 30 to 80, would the answer be even or odd? Explain. I think it would be odd because I used this equation: (30 x 5)+(40 x 5)+(50 x 5)+(60 x 5)+(70 x 5)+(25 x 5)=1325 I used the numbers for each set of ten -30 to 80 times 5 and the amount of the endings-1,3,5,7,9- added, times 5. Is that right?Answered by Penny Nom.     Proving a summation formula by induction 2006-04-19 From Sharon:Prove by induction that the sum of all values 2^i from i=1 to n equals 2^(n+1) - 2 for n > 1.Answered by Stephen La Rocque.     1+3+5+...+(2n+1) 2004-09-10 From Emma:Prove that 1+3+5+...+(2n+1)= (n+1)2Answered by Penny Nom.      Page1/1    Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.    about math central :: site map :: links :: notre site français