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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» Answer :A | |