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If x,2x+1 and 3x-2 are GP with 4th term find (a).x (b).common ratio (c).infinity

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x / (2x + 1) = (2x + 1) / (3x - 2)

"cross" multiplying ... 3 x^2 - 2 x = 4 x^2 + 4 x + 1 ... x^2 + 6 x + 1 = 0

use quadratic formula to find x

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