Find the sum of this:

Sn = 1/1x2 + 1/2 x 3 + 1/3 x 4 + 1/n x (n+1)

[when using x in the denominator, i mean to use it as multiplication. 1/1x2 is bascially 1/2 or can be represented as 1/1 x (1+1)]

I appreciate all help!

I am in a 2de class and no one of 60 students solved it.

Thanks!

Drazil Mar 1, 2019

#1**0 **

I believe the answer is 1

see : https://www.mathsisfun.com/numbers/sigma-calculator.html

ElectricPavlov Mar 1, 2019

#2

#3**0 **

No.....the summation calculators can only go so far....so I put in 99999 to 'imitate' infinity....then the calc spits out all of the calculations....

the result was .9999900000000131 so I think it is safe to THINK/assume ' 1 ' would be the answer.....

ElectricPavlov
Mar 1, 2019

#6**+2 **

Great response! I have somewhat of an understanding of how you got the answer 1. I have also realized from this question that the materials necessary to solve it have not been taught at the grade 10 level, and am a little mad at my math teacher. I really was stuck on this one, great explanation once again!

Drazil Mar 2, 2019