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GATE CS and IT 2015 Paper

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Question : 59

Total: 65

Consider the following 2×2 matrix A where two elements are unknown and are marked by a and b. The eigenvalues of this matrix are −1 and 7. What are the values of a and b?
A=(

1	4
b	a

)

a=6,b=4
a=4,b=6
a=3,b=5
a=5,b=3

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