25. what is the determinant of the following matrix ? 1 **** 1 1/2 1 1/2 1/3 ****| 1 1/2 1/3 1/4 * ** 1 1/2 1/3 1/4 1/n (a) ++1 (b) n n n+n+1 nn+1) 2 (c) (d) n

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