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Question 1
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The sum of infinite terms of decreasing GP is equal to the greatest value of the function $f(x) = x^3 + 3x ā 9$ in the interval [ā2, 3] and difference between the first two terms is f '(0). Then the common ratio of the GP is
A.
$$\frac{-2}{3}$$
B.
$$\frac{4}{3}$$
C.
$$\frac{+2}{3}$$
D.
$$\frac{-4}{3}$$
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