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Preview questions
1. What is the general term in the expansion of (a + b)^n?
nCr * a^(n-r) * b^r · nCr * a^r * b^(n-r) · nCr * a^(n+r) * b^r · nCr * a^(n-r) * b^(n-r)
2. In the expansion of (x + y)^5, what is the coefficient of x^3y^2?
10 · 15 · 5 · 20
3. What is the value of (1 + x)^0?
1 · 0 · x · Undefined
4. What is the sum of the coefficients in the expansion of (x + 1)^4?
4 · 8 · 16 · 1
5. The number of terms in the expansion of (a + b)^n is:
n + 1 · n · 2n · n^2
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