Compute the value of 2 summation equations

Asked Feb 23 '20 at 15:55

Active Feb 23 '20 at 16:08

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Questions:

For a, I got

Is my approach correct? As for b, how do I compute it?

asked Feb 23 '20 at 15:55

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b. works the same. Look up the formula for $\sum k^2$, of you don't know it. – Dietrich Burde Feb 23 '20 at 15:57

1 Answers1

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Hint:

$\displaystyle\sum_i a(i) + b(i) \equiv\sum_i a(i) + \sum_i b(i)$
$\displaystyle\sum_i c\cdot a(i) \equiv c\sum_i a(i)$
$\displaystyle\sum_{i = r}^s a(i) + \sum_{i = s + 1}^t a(i)\equiv \sum_{i = r}^t a(i)$

answered Feb 23 '20 at 16:08

an4s

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