Prove by principle of mathematical induction that for all n ϵM.</br>a+(a+d)+(a+2d)+...+[a+(n-1)=n/2[2a+(n-2)d].

Prove by principle of mathematical induction that for all n ϵM.
a+(a+d)+(a+2d)+...+[a+(n-1)]= n/2[2a+(n-1)d]

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Prove by principle of mathematical induction that for all n ϵM.a+(a+d)+(a+2d)+...+[a+(n-1)]= n/2[2a+(n-1)d]

Prove by principle of mathematical induction that for all n ϵM.
a+(a+d)+(a+2d)+...+[a+(n-1)]= n/2[2a+(n-1)d]