Write the sum using sigma notation: 1 1 1 1 У В, where 1.2 2 -3 3.4 128 · 129 n=1 A B =

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Write the sum using sigma notation:
1
1
+...+
1
B. where
1.2
2-3
3.4
128 · 129
n=1
A =
В —
Transcribed Image Text:Write the sum using sigma notation: 1 1 +...+ 1 B. where 1.2 2-3 3.4 128 · 129 n=1 A = В —
Expert Solution
Step 1

The given sum is 11·2+12·3+13·4++1128·129=n=1AB.

Here notice that every term is in the form of 1nn+1.

For the last term n=128.

So, the value of n varies from 1 to 128.

 

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