- Show that C(n, r)C(r, 2) = C(n, 2)C(n - 2, r - 2) whenever n and r are integers with 2 < r < n.?

Discover Questions

Explain how you can use soh cah toa to help with sine cosine and tangent ratios (Geometry)? What bank in the US has 8 to 9 digit number in the account? What Time Would be 1 hour and 23 Minutes Before 11:00? Which molecule contains an exception to the octet rule? CO2
PCl3
N2O
NO2
CCl4? What is osmotic potential?