If there be `'m'` A.P's beginning with unity whose common difference is `1, 2, 3 ... m.` Show that the sum of their nth terms is `(m/2) (mn - m+ n + 1).`

There are m A.P. Whose common differences are 1,2,3,.. M respectively, the first term of each being unity. Show that the sum of their nth terms is (m)/(2)(mn -m+n+1) .

If the m^th terms of an AP is 1/n and the n^th term is 1/m , prove that the sum of the first mn terms is 1/2(mn+1)

If the m^(t h) term of an A.P. is 1/n and the n^(t h) terms is 1/m , show that the sum of m n terms is 1/2(m n+1)dot

The ratio of the sums of m and n terms of an A.P. is m^2: n^2 . Show that the ratio of m^(th) and n^(th) term is (2m - 1 ) : (2n -1).

The ratio of the sums of m and n terms of an A.P is m^2:n^2 . Show that the ratio of m^(th) and n^(th) terms is (2m — 1): (2n — 1).

The ratio of the sum of m and n terms of an A.P. is m^(2) :n^(2) . Show that the ratio mth and nth term is (2m-1) : (2n-1).

The ratio of the sum of m and n terms of an A.P. is m^(2) :n^(2) . Show that the ratio mth and nth term is (2m-1) : (2n-1).

The ratio of the sum of m and n terms of an A.P. is m^(2) :n^(2) . Show that the ratio mth and nth term is (2m-1) : (2n-1).

The ratio of the sums of m and n terms of an A.P is m^(2) :n^(2) . Show that the ratio of the mth and nth term is (2m-1) : (2n-1) .

If the m^(th) term of an A.P.is (1)/(n) and the n^(th) term is (1)/(m), show that the sum of mn terms is (1)/(2)(mn+1)