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Surds question 3 - C1 2016 Edexcel

Answer has to be explained verbally. I can provide a full written proof.

Answered by Mihir P. • Maths tutor

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Solve the equation 3sin^2(x) + sin(x) + 8 = 9cos^2(x), -180<X<180. Then find smallest positive solution of 3sin^2(2O-30) + sin(2O-30) + 8 = 9cos^2(2O-30).

A curve has equation y = 2x^5 + 5x^4 1 . (a) Find: (i) dy/ dx [2 marks] (ii) d^2y/ dx^2 (b) The point on the curve where x ¼ 1 is P. (i) Determine whether y is increasing or decreasing at P, giving a reason for your answer.

Find the differential of the equation: x^2(2x+5)

Differentiate y=(3x-1)/(2x-1)

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