[" questions."],[" 1.Find the real root ...

[" questions."],[" 1.Find the real root of the quadratic equation "3x^(2)-5x-2=0],[" 2.What is the maximum sum of the following AP series "20+19(1)/(3)+18+....],[" 3.Prove that "cos^(4)x-sin^(4)x=2cos^(2)x-1]

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