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The value of determinant |[ ^n C(r-1), ...

The value of determinant `|[ ^n C_(r-1), ^n C_r, (r+1)^(n+2)C_(r+1)],[ ^n C_r, ^n C_(r+1),(r+2)^(n+2)C_(r+2)],[ ^n C_(r+1), ^n C_(r+2), (r+3)^(n+2)C_(r+3)]|` is `n^2+n-2` b. `0` c. `^n+3C_(r+3)` d. `^n C_(r-1)+^n C_r+^n C_(r+1)`

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