- How do I prove that if det(A)=0 then det(A^2)=0 where A is an nxn matrix?

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What is the solubility in moles/liter for copper(I) chloride at 25 oC Ksp value of 1 x 10-6. Write using scientific notation? Find the length of the curve x=et+e−t,y=5−2t,0≤t≤3? Please solve this question in step by step? What are the advantages of moulding? A rancher raises five time as many cows as horses. If he had 168 animals, how many cows does he have?