Question

In an AP prove that tm+n+tm-n=2tm.

Answer 1

heya mate...

here's ur answer

Step-by-step explanation:

given: t m+n+ t m-n= 2tm

to prove: LHS=RHS

proof: t+(m+n-1)d+t(m-n-1)d

    ⇒t+md+nd-d+t+md-nd-d

     ⇒2t+2md-2d

     ⇒2(t+md-d)

     ⇒now we know that...(t+md-d)=tm

             therefore; LHS=RHS

            hence proved

      hope my answer mightve helped u

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