in the link i wrote the question and the way i tried to solve it(adsbygoogle = window.adsbygoogle || []).push({});

but i got a realy weird answer in the first part

and in the second part i solved it too

but i am not sure if my theoretical knowledge about finding ker and Im are right

http://img512.imageshack.us/my.php?image=img8126fw0.jpg

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# Homework Help: A question in lenear algebra

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