For A=[[1,2],[3,4]], what is cofactor C₁₂?
A=[[1,2],[3,4]] के लिए cofactor C₁₂ क्या होगा?
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Correct Answer
B. -3
ExplanationStep 1: Identify the cofactor concept. Step 2: C₁₂=(-1)^(1+2) times the minor, and the minor is 3, so C₁₂=-3. Step 3: Exam tip: Remember the 2×2 sign pattern + - ; - +.
Step 1: अवधारणा cofactor है। Step 2: C₁₂=(-1)^(1+2)×minor होता है और minor 3 है, इसलिए C₁₂=-3। Step 3: Exam note: cofactor में sign pattern + - ; - + याद रखें।