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!!

Easy Math Editor

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`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
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Comments

Note that there is a minus sign before $(-1)^{a}$ for odd values of $a$ .

Shendy Marcello Yuniar - 7 years, 6 months ago

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 - 7 years, 6 months ago

Math	Appears as
Remember to wrap math in `\(` ... `\)` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$