ISI 2011 Ques 21

[kangkan]

The Matrix X=
C 2
1 C

Also Det X^7=128.
Please find the value of C.

I used the option to calculate the ans..it is coming as 2.

but what is the actual way?

[adury]

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[kangkan]

Hi Adury its not det X^7 but determinat of X^&. That is det of the matrix raised to the power 7

[ojaswini]

|x^7| and |x|^7 is the same. So, that is the right way :)

On Fri, Feb 28, 2014 at 12:29 PM, kangkan [via Discussion forum] <[hidden email]> wrote:

Hi Adury its not det X^7 but determinat of X^&. That is det of the matrix raised to the power 7

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[kangkan]

right..thanks