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in Binomial Theorem by (44.1k points)
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Find the coefficients of(3x2 - 1/3x)9

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Best answer

Here, a = 3x2, b = -1/3x, n = 9.

To get the coefficient of x6, we must  have

x18-3r = x6

18 - 3r = 6

3r = 12

r = 4

Coefficient of x6

 = 378

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