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  • If mth term of an A.P is n and nth term in m, then its rth term is

If mth term of an A.P is n and nth term in m, then its rth term is

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Solution:    T_m=n  , T_n=m

             Rightarrow    T_m-T_n=(m-n)d=-(m-n)Rightarrow d=-1

           Now ,  T_r-T_m=(r-m)(-1)

            Rightarrow    T_r=T_m-r+m=m+n-r

Posted by

Deependra Verma

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