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Find each coefficient described

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Find each coefficient described

7) 2nd term in expansion of (y − 2x)^4
8) 4th term in expansion of (4y + x)^4
9) 1st term in expansion of (a + b)^5
10) 2nd term in expansion of (y − x)^4
asked Oct 26 in ALGEBRA 2 by anonymous
reshown Oct 26 by bradely

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