Question

In an A.P. if mth term is n and nth term is m, where m=n, find the p​

Answer 1

Answer:

a

m

=a+(m−1)d=n

a

n

=a+(n−1)d=m

_________________

(m−n)d=n−m

_________________

⇒d=−1

a+(1−m)=n

⇒a=m+n−1

p

=a+(p−1)d

=m+n−1+1−p

a

p

=m+n−

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