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Please help to write the geometric series using sigma notation and calculate the value of the sum. 1+ (⅖)+(4/25)+(8/125)+(16/625)+...? Let A be a 3 × 3 matrix. If det(cof(A)) = 4, find det(A). (Answer: ±2)
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Here are 4 problems I'm struggling with.? Are the Nebraska and Kansas territories open or closed to slavery?

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