Discrete Math: Q1: a) Find 8 + 32 + 126 + … + 8192.       b) Find 5 + 15 + 45 + · · · + 5·3^20        c) Find 1 − 2/3 + 4/9 − · · · + 2^30 / 3^30 .

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Discrete Math:

Q1: a) Find 8 + 32 + 126 + … + 8192.

      b) Find 5 + 15 + 45 + · · · + 5·3^20 

      c) Find 1 − 2/3 + 4/9 − · · · + 2^30 / 3^30 .

 

Its a single ques with 3 parts. Please answer them & try to explain what is the difference to using formulas.

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