Mathematics · Matrices and Determinants

The number of 3 × 2 matrices A that can be formed using elements from the set {-2, -1, 0, 1, 2} such that the sum of all diagonal elements of ATA is equal to 5, is:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1640
2240
3160
4312✓

Correct answer

312

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The number of 3 × 2 matrices A that can be formed using elements from the set {-2, -1, 0, 1, 2} such that the sum of all diagonal elements of ATA is equal to 5, is:

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The number of 3 × 2 matrices A that can be formed using elements from the set {-2, -1, 0, 1, 2} such that the sum of all diagonal elements of ATA is equal to 5, is:

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