4 marksCalculation of Sums of Arithmetic and Geometric Series

CSEC Additional Mathematics · 2018 · Paper 2 · Question 2(b)

In a geometric progression, the 3rd term is 25 and the sum of the 1st and 2nd terms is 150. The common ratio r > 0.

Determine the sum of the first four terms.

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2(a)(i)Express g(x) in the form a(x + h)^2 + k where a, h and k are constants.[3 marks]
2(a)(ii)On the grid provided below, sketch the graph of g(x), showing the maximum point and the y-intercept.[3 marks]
2(c)Determine the value of 1/alpha^2 + 1/beta^2.[4 marks]

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