a ring and až a for prove that R is. Let R be all aER Then commutative (6) Let A and B. commutati ve that that A.B be two ideals of Sing A+B-R" Then A AB. R with unity prove a such

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Q: Find the equation of the tangent line at (1,2) for x'+2y = 9 y- A= B(x - C)

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