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यदि A=[{:(3,-2),(4,-2)]" तथा "I=[(1,0),(...

यदि `A=[{:(3,-2),(4,-2)]" तथा "I=[(1,0),(0,1):}]` एवं `A^(2)=kA-2I` हो तो k ज्ञात कीजिए।

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यदि x^(2)+2=0 हो तो x का मान होगा-