(Requires Appendix material)A necessary and sufficient condition to derive the OLS estimator is that the following two conditions hold: = 0 and = 0.Show that these conditions imply that = 0.

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(Requires Appendix material)A necessary and sufficient condition to derive the OLS estimator is that the following two conditions hold:  = 0 and  = 0.Show that these conditions imply that  = 0.

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The Answer of (Requires Appendix material)A necessary and sufficient condition to derive the OLS estimator is that the following two conditions hold:  = 0 and  = 0.Show that these conditions imply that  = 0.

(Requires Appendix Material)A Necessary and Sufficient Condition to Derive the OLS