# DST

## Prove that G={−1,1,i,−i} is a group under multiplication.

First need to show that G is indeed closed under the operation * we have 1∗1=1 where 1∈G we have −1∗−1=1 where 1∈G we have … Read more

## Prove the following by using the principle of mathematical induction for all n ∈ N, 1³ + 2³ + 3³ + … + n³ = [n (n + 1)/2]²

Prove the following by using the principle of mathematical induction for all n ∈ N1³ + 2³ + 3³ + … + n³ = [n … Read more

## Undirected Graph and Incident Matrix

Undirected Graph Incident Matrix E1 E2 E3 E4 E5 V1 1 0 0 1 0 V2 0 1 1 0 0 V3 1 1 … Read more