Math Contest : Nassau County Interscholastic Mathematics League
4:14 PM
Muhammad Yusuf
, Posted in
3. Find the sum of the
coefficients in the expansion of (3x – 1)4
4. Point A is on a
circle whose center is O, AB is tangent to the circle, AB = 6, D is inside the
circle, OD = 2, DB intersects the circle at C, and BC = DC = 3. If r is the
length of the radius of the circle, find r2.
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