The coefficient of the middle term in the binomial expansion in powers of \( x \) of \( (1+\alph....

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The coefficient of the middle term in the binomial
\( \mathrm{P} \)
expansion in powers of \( x \) of \( (1+\alpha x)^{4} \) and of \( (1-\alpha x)^{6} \)
W
is the same if \( \alpha \) equals
(1) \( \frac{3}{5} \)
(2) \( \frac{10}{3} \)
(3) \( \frac{3}{10} \)
(4) \( \frac{-3}{10} \)



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