The bridge to probability. The PDF explains the difference between nPr (order matters) and nCr (order doesn’t matter) using a simple "O-M-A" (Order Matters Alert) system.
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Solve for x: 2^x+1=16.
: Defining sine and cosine through coordinates on a circle with radius and working in radians. The bridge to probability
Expand (x+2)^5 (first three terms).
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