Q10Short answer
If a1, a2, a3, ..., an are in A.P., where ai > 0 for all i, show that 1 1 1 n −1 + + ... + = a1 + a2 a2 + a3 an −1 + an a1 + an
If a1, a2, a3, ..., an are in A.P., where ai > 0 for all i, show that 1 1 1 n −1 + + ... + = a1 + a2 a2 + a3 an −1 + an a1 + an