3.6-60 ===== The problem can be solved by writing out explicitly the determinants B1, B2, B3, B4. Subject B3, B4 to cofactor expansion to get the recursion identity of 3.6-60a. Induction is explained in the appendix to the Varberg calculus text currently used for Calc I,II,III. Part 3.6-60b is expected to be solved using the theory of mathematical induction. Graders will award 10 percent for use induction methods (deductions accordingly).