Question: Argue that 1. n 1 n1,n2, . . .,nr n1 - 1, n2, . . .n, - 1 +. n1, n2 - 1, . .
Argue that
1.

n 1 n1,n2, . . .,nr n1 - 1, n2, . . .n, - 1 +. n1, n2 - 1, . . .,n, - 1 n1, n2,. .,nr - 1
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