Question

In an AP, if mth term is n and nth term is m, show that its rth term is (m+n-r).


plssss answer it fast.............​

Answer 1

Step-by-step explanation:

Given

a + (n-1)d = m

a + (m-1)d = n

solve d = - 1 and a = m + 1 - n

rth term = a+(r-1)d = m + 1 - n -(r-1) = m + n - r