if m^th term of an Ap is n and n^th term is m find p^th term.
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Step-by-step explanation:
n = a + (m-1)d
m = a + (n-1)d
m - n = (n-m)d
d = -1
therefore n = a - m + 1
a = m + n - 1
tp = m + n - 1 + (p - 1)*(-1)
tp = m+n-1-p+1
tp = m+n+p
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