For matrix [[11,2],[2,7]], what is the determinant used to check invertibility?
Matrix [[11,2],[2,7]] invertible होगी या नहीं, इसका determinant क्या है?
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Correct Answer
D. 73
ExplanationStep 1: a 2x2 determinant is ad-bc. Step 2: here 11×7-2×2=73; if non-zero, the matrix is invertible. Step 3: tip: this determinant is the denominator in a 2x2 inverse.
Step 1: 2x2 determinant ad-bc होता है। Step 2: यहाँ 11×7-2×2=73; determinant non-zero हो तो matrix invertible है। Step 3: tip: 2x2 inverse में denominator यही determinant होता है।