The coefficient of x4 in the expansion of x2-3x210 is

r=np-kp+q=(10)(1)-41+2=2 The coefficient of X4=10C2128-32 =5.9.128.32=405256

The coefficient of x4 in the expansion of x2-3x210 is

r=np-kp+q=(10)(1)-41+2=2 The coefficient of X4=10C2128-32 =5.9.128.32=405256

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The coefficient of x⁴ in the expansion of ${(\frac{x}{2} - \frac{3}{x^{2}})}^{10}$ is

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$\frac{25}{21}$

$\frac{205}{221}$

$\frac{256}{405}$

$\frac{405}{256}$

answer is D.

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$r = \frac{n p - k}{p + q} = \frac{(10) (1) - 4}{1 + 2} = 2$ The coefficient of

$X^{4} = {10_{C}}_{2} {(\frac{1}{2})}^{8} {(- 3)}^{2} = 5.9 . \frac{1}{2^{8}} . 3^{2} = \frac{405}{256}$

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The coefficient of x4 in the expansion of x2-3x210 is

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The coefficient of x⁴ in the expansion of ${(\frac{x}{2} - \frac{3}{x^{2}})}^{10}$ is