1.

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=0the minumum number of x_i(i.e., x_1,x_2,x_3,…x_n) are equal to -1 is:

Answer»

`n/3`
`(n+2)/3`
`(n-2)/2`
none

Answer :A


Discussion

No Comment Found