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can you solve it??? a+b= a= 1/2+1/4+1/6+1/8+1/10+1/12.....+1/120 b= 1/1+1/2+1/3+1/4+1/6....=1/60:2 can u find the trick????

Guest Jul 20, 2017
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 #1
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a- ∑[1/(2n), n, 1, 120] =2.6844341436766............etc.............(1)

 

b-∑[1/(n), n, 1, 60] =4.679870412951737.............etc. ...........(2)

 

a + b =2.6844341436766..  +   4.679870412951737........ =7.364304556628337 ????????!!!.

Guest Jul 20, 2017
 #2
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Note that a = b/2 so:

 

.

Alan  Jul 20, 2017

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