Waste less time on Facebook — follow Brilliant.

Weird answers !!

Main post link -> https://brilliant.org/practice/algebra/basic-operations-1/exponents/3/

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

No vote yet
2 votes


Sort by:

Top Newest

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

Log in to reply

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. Calvin Lin Staff · 3 years, 8 months ago

Log in to reply


Problem Loading...

Note Loading...

Set Loading...