Write A^{-1} for A = [\table 2,5;1,3]

CBSE Class 12 Math 2011 Solved Paper

Question : 5 of 29

Marks: +1, -0

Write

A^{-1}

for A =

[\table 2,5;1,3]

Solution:

A =

[\table 2,5;1,3]

A^{-1}

1/{|A|} [\table 3,-5;-1,2]

1/{[(2×3)-(1×5)]}

[\table 3,-5;-1,2]

1/(6-5)

[\table 3,-5;-1,2]

A^{-1}

[\table 3,-5;-1,2]

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