Let A be a 2 × 2 matrix
Statement – 1 : adj (adj A) = A
Statement – 2 : | adj A | = | A |

Question

Let A be a 2 × 2 matrix Statement – 1 : adj (adj A) = A Statement – 2 : | adj A | = | A |

Saurabh Koranglekar · Answer

Dear student The answer is both right but 2 is not correct explanation of 1 Regards

Vikas TU · Answer

Answer is (B) Statement-1 is true, Statement-2 is true; Statement-2 is not a correct explanation for Statement-1. |adjA| = |A|^(n-1) = |A| Now adj(adjA) = |A|^n-2 A = A

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Let A be a 2 × 2 matrix Statement – 1 : adj (adj A) = A Statement – 2 : | adj A | = | A |

Let A be a 2 × 2 matrix
Statement – 1 : adj (adj A) = A
Statement – 2 : | adj A | = | A |

2 Answers

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Let A be a 2 × 2 matrix Statement – 1 : adj (adj A) = A Statement – 2 : | adj A | = | A |

Let A be a 2 × 2 matrix Statement – 1 : adj (adj A) = A Statement – 2 : | adj A | = | A |

2 Answers

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Let A be a 2 × 2 matrix
Statement – 1 : adj (adj A) = A
Statement – 2 : | adj A | = | A |