Prove that (a+d),a,(a-d) are three numbers A.P

1.	Prove that (a+d),a,(a-d) are three numbers A.P
Answer» We can prove it as follows As value of d is constant , difference between two terms are equal ...(a+d) - a = a - (a-d)a+d-a=a-a+dd=d ..... here theither terms are in A.P

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