= --- Give combinatorial proofs of the following identities. (a) {0} = 2n-1 – 1. 1. (b) {n-1} = () (c) {n”-2} = (3) + 3(
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= --- Give combinatorial proofs of the following identities. (a) {0} = 2n-1 – 1. 1. (b) {n-1} = () (c) {n”-2} = (3) + 3(
= --- Give combinatorial proofs of the following identities. (a) {0} = 2n-1 – 1. 1. (b) {n-1} = () (c) {n”-2} = (3) + 3(). n
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