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If \(l^{th}\), \(m^{th}\), \(n^{th}\) terms of an \(A.P.\) are \(x\), \(y\), \(z\) respectively, then show that
 
(i) \(x(m - n) + y(n - l) + z(l - m) = 0\)
 
(ii) \((x - y)n + (y - z)l + (z - x)m = 0\)
 
Important!
This is a self-assessment task. Solve this question and assess the solution steps after the test's completion on your own.