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12th Mathematics 2017 Set1 Delhi Board Paper Solution

Question 1

If A is a 3 × 3 invertible matrix, then what will be the value of k if det(A–1) = (det A)k .

Answer

Here, det(A–1) = (det A)k 

⇒ |A–1| = 1 / | A |

⇒ k =  –1
 

Popular Questions of Class 12th mathematics

 

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Let A = R – {3} and B = R – {1}. Consider the function  f : A → B defined by

. Is f one-one and onto? Justify your answer. 

 

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