Given a repunit Rn, show that(a) 91 Rn if and only if 91 n.(b) 11 I Rn if and only if n is even.

17.1 Notes Defenitions: 1. Standard Deviation: Important measure of spread; used to determine normal ( or approximately normal) distribution; symbolized with the greek letter sigma (σ) 2. Point of Infection: Curvature gradually changing from one side to another 3. The 689599.7 Rule: Used for normal distribution...