If [\table \5 ,\2\alpha ,\1; \0 ,\2 ,\1;\\alpha ,\3 ,\-1] is the inverse of a 3 \times3 matrix A, then the sum of all values of \alpha for which det (A) + 1 = 0, is: [12 Apr 2019 Shift 1]

JEE Main 12 Apr 2019 Paper 1 Solved Paper

Section: Mathematics

Question : 78 of 90

Marks: +1, -0

If [

] is the inverse of a 3×3 matrix A, then the sum of all values of α for which det (A) + 1 = 0, is:

[12 Apr 2019 Shift 1]

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