Binomial Theorem (id: f3f2c7705)

本题目来源于试卷:  Binomial Theorem ，类别为 IB数学

[问答题]
Consider the expansionb t(eq.nj4*;yyl i 0sd of )siaam4 ( * hoe xc5+g*e:aih2nqj8hm $(2 x-1)^{9}$ .
1. Write down the number of terms in this expansion.
2. Find the coefficient of the term in $x^{2}$ .

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