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# Weird answers !!

In this Problem he solved it by breaking the question into brackets !! but even then each bracket will equal zero and by summing or subtracting those brackets we get 0 !!! how could he come up with that 23!!

Note by Eman Abulmagd
3 years, 8 months ago

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Note that there is a minus sign before $$(-1)^{a}$$ for odd values of $$a$$. · 3 years, 8 months ago

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The final answer is 26 (not 23 like you mentioned).

As pointed out, each of the terms contribute a value of 1 to the sum, and there are 26 terms. Staff · 3 years, 8 months ago

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