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Each of the numbers x1,x2,x3,x4,x5,...,x...

Each of the numbers `x_1,x_2,x_3,x_4,x_5,...,x_n` `x_nge4` is equal to -1 or 1. If
`x_1x_2x_3+x_2x_3x_4+x_3x_4x_5+...x_(n-3)x_(n-2)x_(n-1)+x_(n-2)x_(n-1)x_n=0` the minumum number of `x_i`(i.e., `x_1,x_2,x_3,…x_n`) are equal to -1 is:

A

`n/3`

B

`(n+2)/3`

C

`(n-2)/2`

D

none

Text Solution

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The correct Answer is:
A
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