Can someone help

[mystic oxide]

can someone tell me how to solve this

[blissful pine]

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[native fjord]

Suppose i = 1. How many terms will the inner sum have?

[mystic oxide]

if "i = 1 " there will be n(n+1)/2 additons

[native fjord]

Oh.
Well, rather, for i = 1 there's just one term, but for all values of i we get 1 + 2 + ... + n = n(n + 1)/2 terms.

[mystic oxide]

So if I'm not mistaking, there will be n(n+1)/2 multiplications and (n+2)(n-1)/2 additions.

[native fjord]

Ohh, sorry. I didn't notice that we had a(i)b(j), I thought we just had a(i, j).

[mystic oxide]

No worries!

[mystic oxide]

+close